EP4094013A1 - Method for forming a luminaire - Google Patents

Abstract

The invention relates to a method for forming a luminaire (1) which has a trough-shaped luminaire housing (10, 110) having a region (25, 125) for accommodating lamps which is surrounded by a seal (40), a cover (70, 80) which spans the region (25, 125) and abuts the seal (40) so as to be peripherally sealed, and a frame-like holding element (50, 150) which presses the cover (70, 80) into abutment with the seal (40). For each of the luminaire housing (10, 110), the cover (70, 80) and the holding element (50, 150), at least two different variants are available for any number of combinations with one another, and, in order to form the luminaire (1) in accordance with the desired output properties and/or properties with regard to heat dissipation or moisture resistance, in each case a suitable luminaire housing (10, 110), a cover (70, 80) and a holding element (50, 150) are selected and the selected components are combined to form the luminaire (1).

Description

description

Method of forming a lamp

The present invention relates to a method for forming a luminaire which has lighting means and operating components for operating the lighting means, which are to be efficiently protected from external influences. In particular, a so-called high bay light is to be formed with the aid of the method according to the invention.

Highbay lights are understood to mean lights that are used, for example, to illuminate larger halls or industrial complexes. In this application, the luminaires are usually mounted at a relatively large distance from the floor, which is why there is a requirement that the luminaire generates light with high intensity, which is then emitted onto the area below, for example a hall. Accordingly, relatively powerful lighting means are used in such lights, which then have to be stored in a suitable manner, whereby care must be taken that on the one hand the heat occurring during operation of the lighting means is dissipated in a suitable manner and on the other hand the lighting means is protected from external influences, in particular Luminosity and / or dust are protected.

A luminaire of the type described above is known, for example, from WO 2014/086770 A1 by the applicant. The luminaire described here is essentially formed by a die-cast aluminum body that has large-area cooling rib structures and cooling channels for dissipating the high heat generated during operation of the lamps. Operating means are positioned centrally between two elongated LED arrangements, the design of the die-cast body being such that air can also flow around a centrally arranged housing in which the operating means are accommodated in order to enable sufficient heat dissipation. By using appropriate cooling air openings, thermal decoupling between the housing for the equipment and the areas of the lamp body in which the lighting means are arranged is largely achieved. This luminaire known from the prior art has proven itself many times and is characterized by its excellent light output and, at the same time, high operational reliability. However, there are only few options for adapting the luminaire to special requirements with regard to the desired light-emitting properties and / or with regard to the efficiency in terms of heat dissipation or protection against external influences. It would be quite advantageous if there were greater, cost-effective flexibility here, which opens up the possibility of adapting the luminaire in a simple manner with regard to the above-mentioned properties, so that it is ultimately ideally suited to the environmental conditions of the place where the Luminaire should be used, is adapted. The present invention is based on the object of providing a corresponding solution for this.

The object is achieved by a method for forming a lamp with the features of claim 1. Furthermore, the object is achieved by a kit for forming a lamp which has the features of claim 2. Advantageous further developments of the invention are the subject of the dependent claims.

According to the present invention, it is provided that the luminaire has, among other things, the three components mentioned below, namely a trough-shaped luminaire housing with at least one area for accommodating lighting means, the area being completely enclosed with a seal, a cover which extends over the The area for receiving the illuminants is stretched and rests against the seal in a closed circumferential manner in order to form a closed space with the luminaire housing, the cover having optics for influencing the light from the illuminants, as well as a frame-like retaining element which is connected to the luminaire housing in this way, that it presses the cover into contact with the seal. According to the invention it is provided here that at least two different variants are available for the luminaire housing, the cover and the holding element, which, however, can be combined with one another in any way, in which case, depending on the desired light-emitting properties and / or properties with regard to a Heat dissipation or moisture resistance in each case a suitable luminaire housing, a cover and a holding element are selected and the selected components are assembled to form the luminaire. According to the present invention, a method for forming a luminaire is proposed, which has:

• a trough-shaped luminaire housing with at least one area for accommodating light sources, the area being surrounded by a seal all the way round,

A cover, which stretches over the area and rests against the seal in a closed circumferential manner in order to form a closed space with the luminaire housing, the cover having optics for influencing the light of the illuminants, and

• A frame-like holding element, the holding element being connected to the lamp housing in such a way that it presses the cover into contact with the seal, whereby according to the invention at least two different variants are available for the lamp housing, the cover and the holding element, which can be used in any way can be combined with each other, and in order to form the lamp depending on the desired light output properties and / or properties in terms of heat dissipation or moisture resistance, a suitable lamp housing, a cover and a holding element are selected and the selected components are assembled to form the lamp.

Furthermore, according to the invention, a kit for forming a lamp is proposed, the lamp having:

• a trough-shaped luminaire housing with at least one area for accommodating light sources, the area being surrounded by a seal all the way round,

A cover, which stretches over the area and rests against the seal in a closed circumferential manner in order to form a closed space with the luminaire housing, the cover having optics for influencing the light of the illuminants, and

• a frame-like retaining element, the retaining element being connected to the luminaire housing in such a way that it presses the cover into contact with the seal, wherein the kit for the lamp housing, the cover and the holding element each comprises at least two different variants, which can be combined with one another in any way.

For the three essential components of the lamp - housing, optically effective cover and retaining element - at least two different variants are available according to the invention, which can, however, be combined with one another in any way. In this way, a lamp can ultimately be realized which can be individually adapted to the planned location of use for the lamp in terms of the design of the housing, the light output properties and, if necessary, the coverage of the area of the devices for operating the lamps. There is thus the possibility of forming a large number of differently designed lights, although the effort required for this is relatively low. Ultimately, there are a large number of different combination options, all of which lead to a high-quality lamp in a simple manner.

In a first step, it can be provided that the available variants of the lamp housing differ in their material and / or shape. It is particularly preferred here that a first variant of the lamp housing is formed by a sheet metal part, which is preferably provided in the form of a deep-drawn sheet metal part. A second variant of the lamp housing can then for example consist of aluminum and in particular be formed by an aluminum die-cast part. Both variants differ on the one hand in terms of production costs and on the other hand in terms of the possibility of influencing the shape of the housing in order to optimize the dissipation of heat. While the luminaire housing made available as a sheet metal part can be produced relatively easily and inexpensively, the production costs for the housing in the form of an aluminum die-cast part are significantly higher, although better heat dissipation can be achieved here. Depending on the environment in which the luminaire will be used, a suitable housing can then be selected here. In the case of the luminaire housing, which is made of aluminum, it can also advantageously be provided that essentially all surface areas of the luminaire housing, which form outer surfaces of the luminaire housing, are designed in such a way that a liquid drains off in a mounted state of a luminaire using the luminaire housing is made possible via the outside of the housing wall and / or via an opening formed in the lamp housing. This design means that liquid that is on the outside or surface of the housing can immediately flow off due to gravity and there is no risk of a larger amount of liquid collecting and thus surface areas of the housing that may be chemically aggressive over a longer period of time Exposed to liquid. This reduces the risk that such liquids will cause corrosion on certain surface areas and ultimately damage the housing. Due to these special advantageous measures, this is significantly better protected against external influences, so that long-term use of the lamp is guaranteed.

With regard to the available variants for the optically effective cover, it can also be provided that these differ in their material and / or the mounting of the optics for influencing the light of the illuminants or the optics themselves. In a first variant it can be provided, for example, that the optics themselves are an integral part of the cover. A one-piece component is thus used here, which in turn can be produced relatively easily and inexpensively. In the case of a second variant of the cover, however, it can be provided that the optics are held as a separate component by the cover. This opens up the possibility, for example, of using different optics or other light-influencing elements such as, for example, color filters or diffusers, which are then optionally inserted into the corresponding cover and held by it. In this way, the light output of the lamp can be specifically adapted to the desired light emission properties. Again, however, both variants of the cover are designed in such a way that they can optionally be combined with any variant of the housing and the holding element. It is particularly preferred that the luminaire housing - regardless of the selected variant - has, in addition to the receiving area for the lighting means, a further area for receiving means for operating the lighting means, for example for receiving operating devices such as converters or the like. The arrangement of batteries or accumulators or sensors in this area would also be conceivable. The holding element then preferably has a further cover which is designed to cover this further area separately from the receiving area for the lighting means. It can be provided here that, in a first variant of the holding element, the further cover is an integral part of the holding element. In a second variant of the holding element, however, it is again provided that the further cover can be releasably fastened to the holding element as a separate cover element, in particular with the aid of a screw connection. While the first variant of this holding element can be produced in a simple and inexpensive manner, the second variant in turn represents the more comfortable but somewhat more costly solution. In particular, it can be provided that the design is such that the separate cover element is attached to the luminaire housing State of the holding element is detachable from this. This means that the cover element can be removed separately in order to carry out repair or maintenance work in the corresponding receiving area in which, for example, the operating devices for operating the lighting means are located. The other areas with the illuminants, on the other hand, are enclosed in a protected manner in this case, so that there is no risk of these illuminants being accidentally touched and / or damaged.

Another advantage of the separate use of the cover element is that different variants of cover elements can be made available which are bulged to different degrees. Depending on which devices are to be arranged exactly in the further receiving area, a correspondingly suitable cover element can accordingly be used, so that here there is again an additional possibility of adapting the configuration of the lamp to the ultimately desired use. Overall, this creates an elegant way of adapting a lamp very individually to the desired use. Despite everything, a reliable and high-quality luminaire is obtained overall. The invention will be explained in more detail below with reference to the accompanying drawing. Show it:

FIGS. 1 and 2: views of a first variant of a lamp which can be implemented with the aid of the method according to the invention;

FIGS. 3 and 4: views of a second lamp variant which can be implemented with the aid of the method according to the invention;

FIG. 5: a first variant of a lamp housing;

FIG. 6: a second variant of a lamp housing;

FIGS. 7 and 8: views of a first variant of a holding element; FIGS. 9 and 10: views of a second variant of a holding element;

Figures 11 and 12: Views of a cover element, which with the second

Variant of the holding element can be combined; FIGS. 13 to 15: views of a first variant of an optically effective cover;

FIGS. 16 to 18: views of a second variant of an optically effective cover; and

FIG. 19: schematically, the procedure for selecting the various available lighting components in order to ultimately form a lighting fixture. The modular concept according to the invention for forming a luminaire will be explained in detail below. Here, two different lamp variants are initially shown in Figures 1 to 4, which can be implemented with the help of the lighting kit according to the invention. The other FIGS. 5 to 18 then show in detail individual components of this kit.

With the aid of the solution according to the invention, as already mentioned, a so-called highbay luminaire is to be formed which, as a relatively compact but powerful luminaire, is suitable for use as a hall luminaire, for example. As in the case of the luminaire described in WO 2014/086770 A1 by the applicant, it is provided that the luminaire ultimately created is arranged at a relatively large distance from the floor, with high-intensity light being generated, which then hits the area below - for example a hall - is blasted.

The basic arrangement of the components responsible for generating the light corresponds accordingly to the arrangement that is also provided for the luminaire of WO 2014/086770 A1. This means that one or more operating devices are positioned in a central area of the luminaire 1, lighting means which are responsible for generating and emitting light are arranged on both sides of the central area. The concept according to the invention can, however, also be applied to other lamp shapes, as will be explained at a later point in time.

The essential components of the lamp 1 according to the invention are a trough-shaped lamp housing and a holding element 50 attached to the lamp housing, which optionally together with optical covers and a cover element encloses areas of the housing in which electronic components of the lamp for generating light are arranged. In the case of the first lamp variant, which is explained in more detail below, these components are provided with the reference numerals 10 (housing), 50 (holding element) and 70 or 80 (optically effective cover). The luminaire 1 shown in FIG. 1 contains both variants of the optically effective cover for clarity, the first variant 70 on the left and the second variant 80 on the right, whereby, of course, identical optical covers are normally used for both sides. As with the prior art luminaire, the luminaire 1 shown in FIGS. 1 and 2 is divided into three areas, a central area running centrally along a longitudinal direction, which is used to accommodate an operating device, and two on both sides of the central area Area formed light emission areas in which the lighting means and the optical components assigned to the lighting means for the light emission are arranged. In the view according to FIG. 1, light is emitted via two essentially rectangular lateral areas of the luminaire 1, via which light is emitted with high intensity.

According to the example shown, the lamp 1 can be suspended or mounted with the aid of brackets 250 which are connected to the housing 10 on the two end faces of the central area on the rear side thereof. The brackets 250 are designed in such a way that they enable suspension elements to be suspended or attached. Of course, other mounting solutions for the lamp 1 would also be conceivable.

First of all, the more detailed configuration of the lamp housing 10, which represents a central component of the lamp 1 according to the invention, will be explained below.

As can be seen in particular from the representations of Figures 1, 2 and 5, the luminaire housing 10 is trough-shaped with an approximately square housing base 11 in the illustrated embodiment, from which a laterally circumferential housing wall 12 extends downwards or in the light emission direction of the luminaire 1 extends, with housing bottom 11 and housing wall 12 delimit a luminaire space. The housing 10 is preferably made of sheet metal and is manufactured using a deep-drawing process, so that it can be manufactured easily and inexpensively. The structural elements of the housing 10, which are described in more detail below, can therefore be formed in a relatively simple manner in a single work step; If necessary, a punching step may be required before or after deep drawing in order to form the through openings and further openings described in more detail below. The primary task of the housing base 11 is to enable the components of the luminaire 1 that are responsible for generating and emitting light to be received over a large area. Accordingly, the housing 10 is designed such that the housing bottom 11 forms three essentially flat areas on its side facing the interior of the housing 10, a central flat area 20 and two lateral flat areas 25 Operating device not shown in the figures is provided, for example, in the form of a converter. In terms of its width, it is essentially adapted to the width of the operating device and is accordingly somewhat narrower than the two lateral receiving areas 25. All three areas 20 and 25 are designed as defined depressions in the base 11 of the housing 10.

The two lateral receiving areas 25 each serve to support one or more LED boards, each of which forms a large-area light source. All three receiving areas 20 and 25 are here - apart from the depressions still described below - designed to be planar in order to enable a flat support of either the operating device or the LED boards. This enables the heat to be transferred to the housing base 11 during operation, as a result of which the cooling of the luminaire components and the heat dissipation is improved.

Attaching the control gear and the LED boards to the luminaire housing

10 can then take place, for example, with the aid of a screw connection, for this purpose the housing base 11 in the receiving areas 20 and 25 is formed with knobs or blind hole structures 27 protruding outward with respect to the luminaire space. These sack lock structures 27 are also created as part of the deep drawing of the lamp housing 10 and enable their threads to be cut into the corresponding sheet metal material of the blind hole structure when the screws are screwed in and thus secure fastening is achieved without the housing bottom 11 being penetrated by the screw . This solution is advantageous insofar as it allows the housing base 11 to be sealed in the area of the fastening of the lamp components. In principle, however, it would also be conceivable to subsequently attach corresponding blind hole structures to the housing base

11 to be welded or soldered on. Also pressing in a corresponding component, which then enables the luminaire components to be screwed to the housing 10, would be conceivable, whereby in all cases a solution is preferably sought which enables the luminaire interior to be sealed to the outside in these areas.

Only the central receiving area 20 additionally has a somewhat larger opening 26 on one end face, through which a power supply cable for powering the operating device can be passed through. In this case, appropriate sealing measures are then provided on the rear of the housing 10, for example in the form of a grommet, which allow the sealed out lead-out of the power supply cable - not shown in detail - so that all three receiving areas 20 and 25 in the assembled state of the lamp 1 to the rear are sealed off.

An essential property of the lamp 1 according to the invention is also that the operating device and the LED lighting means are not arranged together in a single, tightly enclosed space, but instead are formed in each case corresponding to the flat receiving areas 20 and 25, each of which is separate are sealed and closed and accommodate either the converter or the LED light source. The separate arrangement of these luminaire components in three separate rooms opens up the possibility of thermally decoupling the areas from one another on the one hand and allowing cooling air to flow through in the spaces between two adjacent accommodation rooms on the other.

It can be seen here that three elongated through openings 30 are formed in the housing base 11 on both sides of the central receiving area 20, which are part of the cooling air channels described in more detail below, so that cooling air can flow along both sides of the central receiving area 20 for the operating device. The through openings 30 are each delimited by a circumferentially closed edge which extends transversely to the section of the lamp housing 10 that has them. The through openings 30, which of course could also be designed differently with regard to their length and possibly shape, also bring about a material reduction in the area between the central receiving area 20 and the lateral ones Receiving areas 25, so that here there is a certain thermal decoupling and the risk is reduced that, for example, the heat generated by the LED lighting means is transferred to the area 20 with the operating device.

The individual sealing of the three receiving areas 20, 25 is made possible by the fact that the corresponding areas 20 and 25 are each surrounded circumferentially by a ring-like seal 40 (this seal is only shown for the left receiving area 25 in FIG In the preferred embodiment shown, it is provided that the flat receiving areas 20 and 25 are each surrounded circumferentially by a raised and / or recessed ring structure which is again integrally formed in the deep-drawing process and which is used for receiving the Seal 40 are used. In particular, it can be provided that each receiving area is surrounded in a ring-like manner by a wave-like sealing structure 35 which forms a circumferential groove or recess 36 in which the seal 40 is received. The recess 36 thus forms a circumferential channel into which the sealing material can be introduced in a simple manner. This can be, for example, a corresponding PU foam that can be automatically injected into the recess 36 as part of the manufacture of the lamp 1. It is advantageous if the corresponding ring-like depressions 36 all extend within the same plane, since this facilitates the automated application of, for example, the PU foam applied in liquid form for sealing.

The wave-like cross-sectional shape prevents the applied sealing material from flowing away, which collects at the deep point of the wave-like sealing structure 35 and will correspondingly harden slightly here. As an alternative to the aforementioned PU foam, however, other sealing materials or foams could also be used to produce the seal 40. For example, a strand of a corresponding sealing material could be inserted into the depressions 36. In principle, the use of so-called structural sealing materials would also be conceivable, in which case the illustrated wave-like sealing structure 35 could then also be dispensed with. The formation of a simple circumferential groove for receiving the sealing material would also be conceivable. However, the wave-like structuring still goes beyond that the further advantage that it leads to an additional increase in the stability of the tub body.

It should be noted that, despite the circumferential sealing of the three receiving areas 20 and 25, there must be an electrical connection between the central receiving area 20 and the two lateral areas 25 in order to ensure that the operating device can supply the LED lighting means with power in a suitable manner . For this purpose, it is provided that the central area 20 on the side opposite the hole 26 for feeding the external power supply cable is connected to the two lateral areas 25 on both sides via a channel-like recess 37 or a channel section. These depressions 37 or channel sections, which run transversely to the sealing structures 35 and interrupt them locally, can then be used, starting from the operating device, to lead the lines or cables required for powering the LEDs into the adjacent area 25.

Before the sealing of the receiving spaces due to the interaction of the luminaire housing 10 with the holding element 50 and the covers 70 or 80 is explained in detail below, the configuration of the surrounding housing wall 12 will be explained in the following.

As already mentioned, this consists of four side wall areas 13 extending from the housing base 11, which are designed in the context of the deep-drawing process in such a way that they widen away from the housing base 11 and thus in a funnel-like manner in the light emission direction of the lamp 1. The deep-drawing process here advantageously leads to the side wall areas 13 merging into one another in one piece at the corners of the housing 10 and thus no further measures for connecting the wall areas 13 are required. Structures 14 that stabilize the housing 10 as a whole can be embossed on the side wall regions 13. In order to better conceal these structures 14 and to be able to additionally increase the stability of the housing 10, it is further provided that the circumferential housing wall 12 has a circumferential edge 16 protruding horizontally outward at its edge region. This edge 16 runs in a plane which is aligned parallel to the plane of the housing bottom 11, and additionally gives the lamp 1 an overall more harmonious appearance. Ultimately, then, this fulfills Luminaire housing 10 numerous important functions of the luminaire 1 and despite everything can be produced in a simple and inexpensive manner.

In comparison to the housing 10 of the variant of the lamp 1 shown in FIGS. 1 and 2, a different lamp housing 110, which can be produced with greater effort, is used for the second lamp variant of FIGS. 3 and 4. This housing 110 is also trough-shaped with a housing base 111, starting from which a circumferential housing wall 112 extends downwards or in the light emission direction of the lamp 1, the housing base 111 and 112 delimiting a lamp interior whose dimensions are comparable to the lamp housing 10 of the first Variant.

The housing 110 is now, however, preferably provided in the form of a die-cast aluminum body, since in this way the design of the housing 110 described in detail below can be implemented in an efficient manner. In principle, the use of other suitable materials would also be conceivable, provided that these enable a corresponding shaping. In particular, corresponding plastic materials would also be conceivable here, which would enable the housing 110 to be manufactured in a manner comparable to that of aluminum, in particular in the context of an injection molding process, but then must have a correspondingly adequate stability and heat resistance.

In the same way as the first variant of the lamp housing 10, the housing base 111 of the second variant also provides areas 120 and 125 for receiving or storing the components responsible for generating and emitting light. The flat lateral areas 125 for the lighting means are identical in terms of their dimensions to those of the first housing variant 10. The central area 120, however, can now be made significantly deeper than the two lateral receiving areas 125 and in this case forms one over the In the plane of the flat receiving areas 125, the rectangular receiving space protrudes on the rear side, but is again closed towards the rear.

Another difference of the second housing variant 110 is that on the top or rear side of the housing 110 several parallel to each other Cooling fins 114 are formed, through which a significant increase in the surface is created. A heat exchange with the ambient air is hereby promoted, so that an improved heat dissipation is achieved in comparison to the first housing variant 10. The ribs 114, which have a height of about 1 cm, extend transversely to the longitudinal direction of the three receiving areas 120 and 125 and are optionally interrupted by the receiving area 120 for the operating device protruding from the rear.

A thoroughly relevant problem with known luminaires of the type shown has been that, depending on the environment in which the luminaires were used, they were sometimes exposed to very high levels of luminosity. In particular, there was the risk that liquid would collect in certain areas of the surface of the housing. Due to external influences, this accumulating liquid could be chemically aggressive and attack the material of the luminaire housing, which could ultimately lead to the risk of corrosion and damage to the luminaire as a whole.

According to the present invention, the second housing variant 110 is therefore designed in a special way, so that such problems can be avoided.

In particular, it is provided that essentially all surface areas of the housing 110, which form the outer surfaces of the lamp housing 110, are designed in such a way that the accumulation of large amounts of liquid is prevented. For this purpose, it is provided that the surface areas mentioned are designed in such a way that liquid located thereon can basically flow off due to gravity.

In particular, the rear surface areas of the housing 110 are cambered, i.e. slightly convexly curved, which ultimately means that essentially no flat surface areas, but in particular no depressions that would allow liquid to accumulate, arise on the rear side of the housing 110. Instead, in principle, each sub-area of the outer surface of the housing 110 has an inclination or curvature - albeit a slight one - compared to the horizontal, which leads to liquid either laterally over the outer sides of the housing wall 112 or through the through openings provided in the center of the housing 110 130 can drain. Ultimately, no surface area of the luminaire housing 110 will be covered with liquid for a long period of time, so that it is impossible to attack the material of the housing 110 or a corresponding coating and ultimately damage the housing 110. This ensures permanent protection of the components located within the lamp housing 110.

The mentioned crowning or inclined design of the surface areas can possibly also relate to the upper edges of the cooling fins 114 already mentioned. However, these are usually made so narrow that no significant amount of liquid will collect here anyway. Accordingly, it is primarily important to ensure that the flat areas of the rear side of the lamp housing 110 are designed in the manner described above. A slight inclination of the rear side 120a of the receiving area 120 for the operating device would also be advantageous in order to avoid the accumulation of liquid in this area as well.

The LED boards are also fastened in the second housing variant 110 by means of a screw connection, with the housing base 111 in the corresponding receiving areas 125 again being formed with recesses or blind hole structures 127 protruding outward with respect to the interior of the luminaire. These depressions 127 are already created during the production of the lamp housing 110 and thus enable secure fastening without the housing bottom 111 being penetrated by the corresponding screws. Further depressions 128 can then be used for the corresponding introduction of positioning aids or the like, by means of which a reliable alignment and fastening of the LED boards or of the optically effective covers 70 or 80 described in more detail below is ensured.

Another difference to the first variant of the lamp housing 10 in the second variant 110 is that openings 120c and 125c are provided on the bottom surfaces of the receiving areas 125 or the side walls 120b of the central receiving area 120, the end areas of two tubular connecting channels 124, via which the lateral areas 125 are each connected to the central area 120. These channels 124 serve to lay connection cables in a simple manner from the operating device arranged in the central receiving area 120 to the lighting means located in the lateral areas 125. However, since these channels 124 themselves are tight to the outside and only open with their ends into the receiving areas 120 and 125, this ultimately means that the three receiving areas 120, 125 are completely sealed off by the housing 110 when viewed overall towards the rear , as is the case in an analogous manner with the first variant of the housing 10.

In contrast to the first variant, however, the channels 124 run completely outside of the ring structures surrounding the receiving areas 120, 125, which are provided for receiving the seal 40. These sealing structures 135 with the ring-like depressions or channels 136 are also provided in the same way in the second housing variant 110, since here the sealing of the receiving areas 120 and 125 takes place in an identical manner as in the first variant 10 left receiving area 125 shows the seal.

The sealing of the receiving areas 20, 120, 25, 125 for the operating device and the LED lighting means will now be explained in more detail below. Both housing variants 10 and 110 provide these three areas with correspondingly surrounding seals, but it is necessary that these areas are covered accordingly in order to protect the luminaire components located therein from external influences, in particular dust and / or moisture.

The previously mentioned holding element, which is shown in a first variant in FIGS. 7 and 8, is responsible for this task. This variant will first be explained in the following.

In the exemplary embodiment shown, the holding element 50 itself only interacts directly with the seal 40 surrounding the central receiving area 20, 120 for the lamp operating device, whereas the receiving areas 25, 125 for the LED lighting means are provided by optics or translucent covers described in more detail below sealed, however, from the Holding element 50 are mounted in such a way that they interact in a sealing manner with the corresponding circumferential seals.

As FIGS. 7 and 8 show, the holding element 50 consists initially of a circumferential frame 51 which roughly corresponds to the shape of the lamp housing 10 and is therefore square, which is spanned in the central area by an approximately hood-like cover 52. This dome-like or hood-like cover 52 protrudes slightly in comparison to the plane of the underside of the frame 51, so that it forms a somewhat recessed receiving space or a chamber. The height and also the width of the cover 52 can of course be adapted as required to the dimensions of the operating device and, if necessary, further electrical or electronic operating components for operating the LED lamps that are to be positioned in the area of the operating device. The use of an additional carrier would also be conceivable so that the components accommodated in this area can be stored in several levels. It is decisive that the hood-like cover 52 has a circumferentially closed edge 53 or an edge on its area facing the housing base 11, 111, which in the mounted state of the holding element 50 on the lamp housing

10, 110 contacts the seal 40, in particular dips into the flexible material of the seal 40. As a result, the housing 10, 110 and the holding element 50 together completely seal the central receiving space, so that the operating device is safely and reliably protected from external influences.

The holding element 50 is fastened to the housing 10, 110 by means of a large number of screw connections, the holding element 50, which is preferably manufactured by injection molding, has corresponding openings 55 or cylinder-like reinforcements with openings that are connected to bores in the housing base 11, 111 of the lamp housing 10 , 110 correspond. The bores of the lamp housing 10, 110 are each outside the areas 20, 120 and 25, 125 to be sealed, which is why the housing base is actually simple here

11, 111 completely penetrating bores or openings can be used. As an alternative to this, however, the bores on their rear side could again be provided with the blind hole structures already explained above. Furthermore, other through openings or Latching structures for preferably releasable attachment to the luminaire housing 10, 110 can optionally be provided by means of separate attachment means, such as screws.

A second variant of a holding element 150 is shown in FIGS. In contrast to the first variant of the holding element 50, this second holding element 150 itself does not form a cover for the central receiving area of the lamp housing 10, 110, but instead serves to hold a separate cover element, which is shown in FIGS. 11 and 12.

As shown in FIGS. 9 and 10, the holding element 150 in this alternative variant again initially consists of a circumferential, roughly the shape of the lamp housing 10, 110 and thus rectangular or square frame 151, which now has no integral cover in the middle area , but instead has only two connecting webs 152 running parallel to the longitudinal sides. These webs 152, which run in the area of the through openings 30, 130 of the housing 10, 110 and thus on both sides of the central receiving area 20, 120, then enable the attachment of a dome-like or hood-like separate cover element 170, which is shown in FIGS 12 is shown. This cover element 170 is fastened to the holding element 150 with the aid of a plurality of screws which penetrate through corresponding bores 153 or screw receptacles 173 in the webs 152 of the holding element 150 and the cover element 170. The screw connection is designed in such a way that even when the retaining element 150 is already in the assembled state, only the cover for the central receiving area 20, 120 can be opened and thus maintenance or repair work can be carried out separately in this area. The protected arrangement of the illuminants in the lateral receiving areas 25, 125 is then retained in this case, so that there is no risk of them being accidentally damaged or touched.

The cover element 170 has a dome-like or hood-like cover area 171, which is initially surrounded by a circumferential, flange-like web 172, the already mentioned screw receptacles 173 for the screw connection with the holding element 150 being formed on the two longitudinal sides of this web 172. The two front-side areas of the web 172 are then received in corresponding recesses 154 on the underside of the holding element 150, which in this way are dimensioned that in the screwed-on state of the cover element 170, the web 172 and the underside of the holding element 150 lie in a common plane, as can be seen in particular in Figure 3, which the holding element 150 and the cover element 170 in the assembled state and attached to the lamp housing indicates. Furthermore, a closed further web 180, which forms a circumferentially closed sealing edge 181, extends from the outer circumference of the cover region 171 towards the rear (and thus perpendicular to the circumferential web 172).

When the cover element 170 is installed, i.e. screwed on, the dome-like or hood-like cover area 171 protrudes slightly compared to the plane of the underside of the frame 151, so that it forms a somewhat recessed receiving space or chamber that can be used to accommodate the operating device . In a comparable way, in addition to the operating device, additional components such as batteries or accumulators for emergency lighting, sensors such as presence or brightness sensors or comparable lighting components can also be arranged in this variant.

It would also be conceivable to optionally provide one or more further cover elements 170, the cover area 171 of which is more bulky and thus clearly protrudes beyond the holding element 150 and the housing 10, 110 of the lamp 1 towards the underside. This not only creates a particularly large receiving area for storing a large number of operating components for the lamp 1, but also opens up the possibility of storing particularly temperature-sensitive components. This is because most of the heat is given off by the lighting means during operation of the lamp 1, but this heat is more likely to migrate upwards, so that components positioned below this level of the lighting means are better protected against overheating.

For the sealing of the central receiving area 20, 120 it is crucial that the cover element 170 now has the circumferentially closed edge 180 with the sealing edge 181 on its area facing the housing base 11, 111, which in the mounted state of the holding element 150 on the luminaire housing 10, 110 as well as in the screwed-on state of the cover element 170 - analogous to FIG Sealing edge 53 of the first holding element 50 - contacts the seal 40, in particular dips into the flexible material of the seal 40. In this way, analogous to the variant described above, the central receiving space is completely sealed together by the housing 10, 110 and the holding element 150 with the cover element 170 screwed on it, so that the operating device and any other components that are stored in this area are safe and secure are reliably protected from external influences.

With regard to its further properties, in particular with regard to the holding of the optically effective covers 70 or 80 explained below and the through openings for the cooling air ducts, the holding element 150 shown in FIGS. 9 and 10 then corresponds to the holding element 50 already explained above. That is, the combination comprising holding element 150 and separate cover element 170 can be used as a full replacement for holding element 50 described above.

The main advantage, however, is that by unscrewing the cover element 170, the cover for the central receiving space can be opened at least temporarily in order to carry out repair or maintenance work, while the holding element 150 can remain on the luminaire housing 10, 110 and accordingly the light sources are still appropriately protected.

Furthermore, the two-part variant of the holding element 150 with the cover element 170 opens up the possibility of using different materials for the two components. This can be advantageous if, due to the area of application of the lamp, certain materials are to be used deliberately in order, for example, to adapt the lamp's ability to dissipate heat and / or its chemical resistance accordingly. Ultimately, this variant allows the luminaire to be assigned specific individual properties even more flexibly.

A sealing corresponding to the previously described interaction between the cover 52 or 170 with the seal 40 for the central receiving area 20, 120 is also for the two receiving areas 25, 125 for the LED lighting means provided, although in the illustrated embodiments the holding element 50, 150 itself does not come into direct contact with the seals, but this function is fulfilled by a transparent cover 70 and 80, respectively.

These covers 70, 80 are in the area of the openings 56, 156 of the frame 51, 151 formed on both sides of the hood-like cover 52 or the cover element 170, which ultimately form the light emission openings of the frame-like holding element 50, 150, and are received by the holding element 50, 150 held and positioned in such a way that they can interact with the seals 40.

The figures show two different variants of the transparent covers 70, 80, which are each shown individually in FIGS. 13 to 15 and 16 to 18, respectively. In both cases, the cover also serves to influence the light emitted by the LEDs or to hold a corresponding optical system.

Basically, in both variants of the hood-like or dome-like cover 70 and 80, it is provided that it has a flat light-emitting area 71, 81 which is surrounded circumferentially by a U-shaped edge 72, 82, the one leg that tapers towards the seal 40 73, 83, a connecting leg running transversely thereto and an inner leg connecting the connecting leg to the rest of the cover 70, 80, the U-shape on the one hand increasing the stability of the cover 70, 80 and on the other hand the outer leg 73, 83 pointing upwards and forms a sealing edge 74, 84 extending around in one plane. The function of this sealing edge 74, 84 is comparable to the edge 53 of the cover 52 or the edge 181 of the cover element 170. That is, in the assembled state, the edge 74 or 84 plunges into the circumferential seal 40 on the housing base 11, 111 of the luminaire housing 10 , 110 and thereby completely encloses the corresponding receiving area 25, 125 for the LED lamps. In this case, too, a completely sealingly enclosed space is obtained in which the LED lighting means are now received. The holding or positioning of the cover 70 or 80 required for this is achieved by the holding element 50, 150, which has an inwardly protruding support edge 57, 157 or a support web surrounding the two openings 56, 156. In the assembled state, the covers 70 and 80 are then floating with their lower edge of the U-shaped edge 72 on the support edge 57, 157, the dimensions of the holding element 50, 150 are selected such that it is ensured that the cover 70 or . 80 actually cooperates sealingly with the respective seal 40 · The support edge 57, 157 here extends in a plane transversely or orthogonally to a pressing direction for pressing the cover 70, 80 into contact with the seal 40. 157 could also be provided in sections of support or support areas, which are then distributed, preferably evenly distributed, on the circumference of the openings 56, 156.

A certain amount of play in the mounting of the cover 70 or 80 is desired, however, insofar as slight transverse displacements due to different temperature expansion coefficients in the materials of the lamp 1 can be absorbed. In the exemplary embodiment shown, the cover 70 or 80 is not rigidly connected to the holding element 50, 150 or the lamp housing 10, 110. Instead, during the assembly of the lamp 1, only the cover 70 or 80 is correspondingly inserted into the holding element 50, 150 and this is then screwed to the lamp housing 10, 110 in the manner described above.

The two variants of the cover 70 or

80 differ primarily with regard to the mounting of further optical elements which are provided for influencing the light emitted by the LED lighting means. In both cases these are TIR lenses 90 positioned on the rear side opposite the light emitting surface of the respective cover 70, 80, which bundle the light emitted by an LED in a known manner and emit it in a directed manner towards the underside. In this case, it is ideally provided that a lens 90 is used for each LED or LED cluster of the lighting means, the LED or the associated LED cluster then engaging in the recess 91 formed on the upper side of the lens 90. This arrangement of the lens 90 with respect to the associated The LED and the design of the lens 90 ensure that the light emitted by the LEDs in almost all directions is influenced in the desired manner and is used for efficient light emission.

In the variant of the cover 70 shown in FIGS. 13 to 15, it is provided that the lenses 90 are an integral part of the cover 70 and are correspondingly integrally formed on the rear side thereof. In this case, the cover 70 then preferably consists of the same transparent material throughout, although it would also be conceivable to form those components through which light passes or which are intended to influence the light from a different material than the rest of the cover 70 .

The variant shown in FIGS. 16 to 18, on the other hand, represents a particularly preferred embodiment for the cover 80, since the cover 80 now serves to additionally support a separate component 88 which contains the lenses 90. For this purpose, the cover 80 has two circumferential webs 85 and 86 on the rear side opposite the light exit side, the web 85 with its upper edge forming a ring-like support surface for the lens plate 88 and the slightly higher circumferential web 86 laterally encompassing the plate 88 with little play . The advantage of this solution is that the lens plate 88 can easily move to the side compared to the cover 80 or slight displacements are possible. This opens up the possibility that the sealing edge 84 of the cover 80 is permanently in contact with the seal 40 and, in spite of everything, the lens plate 88 can optionally wander along with the LEDs. Relative shifts caused by temperature can thereby be better absorbed and a permanently correct positioning of the lenses 90 with respect to the LEDs is ensured. The correct alignment of the lenses 90 with respect to the LEDs can also be supported in that peg-like positioning or centering pins (not shown in more detail) are formed on the lens plate 88, which engage in corresponding openings in the LED board. In the housing base 11, 111 of the lamp housing 10, 110, corresponding bulges 28, 128 can be provided for this purpose, which enable a corresponding centering pin to be introduced, but do not hinder the flat support of the LED board on the receiving area 25, 125 in spite of everything. Of course, such Positioning elements can also be used in the cover 70 according to the first variant.

The variant shown in FIGS. 16 to 18 represents, as already mentioned, a particularly preferred embodiment for designing the cover 80 and the associated optical system for influencing the light output. Another advantage of the mechanical decoupling between cover 80 and optics 88 is that that the optics as well as the underlying LED boards are less prone to impact and thus damage due to vibrations - e.g. when transporting the light 1 - can be avoided.

Of course, additional variations can also be made in the implementation of the covers 70, 80. These relate, for example, to the design of the optical elements for influencing the light, whereby, for example, other light-refracting or light-scattering elements or structures could also be used as an alternative to the lenses 90 shown. In particular, suitable prism structures or lenses designed in some other way that could possibly also be arranged on the underside, that is to say the light-emitting surface of the cover, should be considered here. Furthermore, additional foils could optionally be inserted in order to influence the light output in the desired manner. In principle, the optics can have optical materials such as scattering particles or conversion particles, optical structures such as a roughened surface, and / or optical elements such as lenses or a lens array.

The choice of material can also be adapted to the desired light output, in which case, in particular, a choice of material influencing the color tone or the color temperature of the light output would also be conceivable. In the second variant, there is also the possibility of forming the cover 80 and the optics 88 from different materials. In this case, a particularly chemically resistant material can then be selected for the cover 80, while the optics 88, on the other hand, are formed from a material which can be used in a particularly suitable manner to influence the light.

Finally, it would also be conceivable to configure the cover 70 or 80 in such a way that it is an integral part of the holding element 50, 150. In particular in the event that another separate lens plate 88 is provided for influencing the light, as in the variant of FIGS. 16 to 18, the advantage can be achieved that on the one hand the receiving space or the chamber for the LED lamps is permanently sealed and on the other hand the lenses 90 are correctly positioned in relation to the LEDs.

Another function of the holding element 50, 150 and of the cover element 170 fastened to it, if applicable, is that they enable cooling air to flow through the through openings 30, 130 of the lamp housing 10, 110. For this purpose, the holding element 50, 150 initially has openings 60, 160 corresponding to the through openings 30, 130 of the housing 10, 110. The same applies to the cover element 100, the openings 60 of the holding element 50 and the openings 185 of the cover element 170 additionally each being enclosed by circumferential webs 61, 186. These webs 61, 186 are oriented essentially transversely to the section of the holding element 50 or of the cover element 170 that has them, but are aligned at a slight incline and are aligned on their upper side with the through openings 30, 130 and 160 of the lamp housing 10, 110 and, if applicable, of the holding element 150, so that cooling air ducts that widen slightly downwards are formed, which, as already mentioned, are formed on both sides of the receiving area 20, 120 for the operating device.

The webs 61, 186 can delimit the through openings 30, 130 of the lamp housing 10, 110 laterally on the inside or outside and, in a preferred embodiment, rest against them. In this way, a corresponding splash guard can be provided so that no splash water gets into the space between holding element 50, 150 and cover 70 or 80, which would be disadvantageous in particular in the area of seal 40. In order to be able to discharge water that penetrates, for example, corresponding holes can be provided in the holding element 50, 150 and / or the cover element 170, through which holes water can run off from this limited space.

The thermal passage openings 30, 130 can also be bent all the way around inwards or downwards. In this way, the edges of the thermal passage openings 30, 130, which are bent over in particular towards the holding element 50, 150, can be connected to the above-described webs 61, 186 of the holding element 50 or the Cover element 170 form a preferably continuous cooling air and drainage channel that is closed at the edge. In cross-section, this channel is then designed in such a way that, starting from below, it initially tapers to approximately half the height and then widens again.

The passage channels formed in the manner described above thus enable cooling air to flow through on the one hand, but also allow liquid to flow off on the other. As already mentioned, in the second variant, the rear of the lamp housing 110 is designed in such a way that no larger amount of liquid can collect there, since it either flows off laterally over the housing wall 112 or is diverted downwards through the through channels. The funnel-like design of the channels is also advantageous here, as they initially taper towards the bottom and accordingly the risk of downwardly flowing liquid penetrating laterally into the sealing areas between the various components of the luminaire 1 is reduced.

Another special feature of the second variant of the lamp housing 110 is the interaction of the cooling air ducts mentioned with the specially designed surface of the lamp housing 110. The shape explained above leads to the fact that air flowing from the bottom up along the outside of the housing 110 will initially flow along the rear of the housing 110 towards the central area. Here, this air will meet the air flowing vertically upwards through the cooling air ducts, which air has a relatively high speed due to the design of the ducts and the so-called Venturi effect resulting from this. Ultimately, this leads to an outwardly directed air vortex being created above the lamp housing 110 on both sides of the central receiving area 120 for the operating device. This not only ensures particularly efficient dissipation of heat to the ambient air, but also contributes to preventing the accumulation of dust or dirt particles on the surface of the luminaire housing 110. Any cleaning cycles required for the lamp 1 can thus be extended or lengthened, which is advantageous insofar as the lamp 1 is usually not readily accessible due to its intended use and the resulting assembly. In the cases described so far, it was assumed that the interaction with the seal 40 takes place in that the corresponding edges or edges of the various covers penetrate into the seal 40, but are not connected to it, so that the retaining element 50, 150 is removed and the covers 70 or 80 is possible again at a later point in time. However, it could also be provided that the sealing material is glued to the corresponding edges or edges, whereby the sealing effect can optionally be additionally increased. In this case, however, a later opening of the lamp 1, for example for maintenance purposes, is only possible with the destruction of the seal 40.

As is clear from the above explanations, the luminaire housing, the holding element, possibly in combination with the separate cover element and the optical covers, always work together in a corresponding manner in order to realize a luminaire that on the one hand generates and emits high quality light in large quantities and on the other hand, is well protected against external influences. However, the different variants of the housing, the holding element and the optical covers have different advantages in terms of their properties or the possibility of producing them, so that depending on the respective field of application of the lamp it can be advantageous to select or have more expensive but higher quality components to fall back on the cheaper option. The decisive advantage of the solution according to the invention is that the different variants of the three essential components (luminaire housing, holding element with optional separate cover element and optical cover) can be combined in any way and, despite everything, simple assembly to form a luminaire is made possible.

This idea is shown schematically in FIG. 19, whereby a decision must first be made as to which of the two housing variants 10 and 110 is to be selected before the lamp is installed. Once this decision has been made, one of the two optical covers 70 or 80 can be selected depending on the desired light emission properties and, if applicable, the required chemical resistance. Finally, the decision must be made whether the first variant of the holding element 50 with an integrated cover for the The receiving area for the operating devices is selected or, alternatively, the second variant 150, in which, as already mentioned, the separate cover element 170 is used, which in particular also enables the area for the operating device to be opened easily. In this case, it is then possible, if necessary, to choose again between different variants for the separate cover element 170, the luminaire 1 then ultimately being created from these three or four selected components. Of course, the LED boards and the corresponding operating devices must also be installed here, although this is done independently of the selection of the aforementioned components of the kit. The fact that all components can be combined with one another in any way means that a lamp can be created that is precisely tailored to the relevant needs.

Another advantage of the solution according to the invention, which should be emphasized at this point, is that the assembly of all relevant components of the luminaire takes place from one direction, namely from the underside or the light emitting side of the housing. This applies both to the arrangement of the seals and to the mounting of the lamps, the operating components for operating the lamps and any connecting lines for powering the lamps. In principle, all of these components are introduced into the luminaire housing from the same direction, whereby it is not necessary to carry out additional work from the rear. This is advantageous insofar as it means that it is not necessary to turn the housing during assembly of the lamp, which opens up the possibility of automating the assembly process to a large extent or even completely. Thus, the lamp according to the present invention is not only characterized by its already described advantageous properties in terms of light emission properties, heat dissipation and resistance to external influences, but also has the advantage that the assembly of the lamp is relatively easy can.

The concept according to the invention can easily be extended to other sizes or sizes for the lamp. In particular, there is the possibility of expanding the number of chambers or rooms for accommodating operating devices or lighting means as required. One way would be consist, for example, in realizing a housing which has a total of four receiving areas for lighting means as well as two receiving areas for operating devices that may be connected to one another. Ultimately, this corresponds essentially to a doubling of the inventive concept shown in the figures, it only being necessary to provide the housing as a whole in the extended form. All other components could then be used in the manner described above, regardless of the number of receiving areas used. In the example described, two identically designed holding elements with corresponding optical covers and cover elements are used, which are then arranged one behind the other in the longitudinal direction.

Claims

Expectations 1. A method for forming a lamp (1), comprising: • a trough-shaped luminaire housing (10, 110) with at least one area (25, 125) for accommodating lighting means, the area (25, 125) being surrounded by a seal (40) in a closed circumferential manner, • a cover (70, 80) which stretches over the area (25, 125) and rests against the seal (40) in a closed circumferential manner in order to form a closed space with the luminaire housing (10, 110), the cover ( 70, 80) has optics for influencing the light of the illuminants, • a frame-like holding element (50, 150), the holding element (50, 150) being connected to the lamp housing (10, 110) in such a way that it presses the cover (70, 80) into contact with the seal (40), with for the luminaire housing (10 110), the cover (70, 80) and the holding element (50, 150) at least two different variants are available, which can be combined with one another in any way, and wherein to form the luminaire (1) Depending on the desired light emission properties and / or properties with regard to heat dissipation or moisture resistance, a suitable lamp housing (10, 110), a cover (70, 80) and a retaining element (50, 150) can be selected and the selected components for the lamp (1) be joined together. 2. Kit for forming a lamp (1), which has: • a trough-shaped luminaire housing (10, 110) with at least one area (25, 125) for accommodating lighting means, the area (25, 125) being surrounded by a seal (40) in a closed circumferential manner, • a cover (70, 80) which stretches over the area (25, 125) and rests against the seal (40) in a closed circumferential manner in order to form a closed space with the luminaire housing (10, 110), the cover ( 70, 80) has optics for influencing the light of the illuminants, • a frame-like holding element (50, 150), the holding element (50, 150) being connected to the lamp housing (10, 110) in such a way that it presses the cover (70, 80) into contact with the seal (40), the kit for the lamp housing (10, 110), the cover (70, 80) and the holding element (50, 150) each comprising at least two different variants which can be combined with one another in any way. 3. The method or kit according to claim 1 or 2, characterized in that the available variants of the lamp housing (10, 110) differ in their material and / or shape. 4. The method or kit according to claim 3, characterized in that a first variant of the lamp housing (10) is formed by a preferably deep-drawn sheet metal part. 5. The method or kit according to claim 4, characterized in that a second variant of the lamp housing (110) consists of aluminum, in particular is formed by an aluminum die-cast part. 6. The method or kit according to claim 5, characterized in that in the second variant of the lamp housing (110) essentially all surface areas of the lamp housing (110) which form outer surfaces of the lamp housing (110) are designed such that they are mounted in one State of a luminaire (1) using the luminaire housing (110) allow a liquid to flow off over an outer side (112) of the housing wall (111) and / or an opening (130) formed in the luminaire housing (110). 7. The method or kit according to one of the preceding claims, characterized in that the available variants of the cover (70, 80) differ in their material and / or the holder of the optics (90) for influencing the light of the illuminants. 8. The method or kit according to claim 7, characterized in that in a first variant of the cover (70) the optics (90) is an integral part of the cover (70). 9. The method or kit according to claim 8, characterized in that in a second variant of the cover (80) the optics (90) is held as a separate component from the cover (80), preferably held floating. 10. The method or kit according to one of the preceding claims, characterized in that the luminaire housing (10, 110) has, in addition to the receiving area (25, 125) for the lighting means, a further area (20, 120) for receiving means for operating the lighting means wherein the holding element (50, 150) has a further cover (52, 171) which is designed to cover the further area (20, 120) separately from the receiving area (25, 125) for the lighting means. 11. The method or kit according to claim 10, characterized in that in a first variant the further cover (52) is an integral part of the holding element (50). 12. The method or kit according to claim 11, characterized in that in a second variant the further cover (171) as a separate cover element (170) can be releasably attached to the holding element (150), in particular with the aid of a screw connection. 13. The method or kit according to claim 12, characterized in that the cover element (170) is detachable therefrom when the holding element (150) is fastened to the lamp housing (10, 110). 14. The method or kit according to claim 12 or 13, characterized in that different cover elements (170) are available which are bulged to different degrees.