JP5796211B2 - Lighting device and lighting system using the same - Google Patents

Description

  The present invention relates to an illumination device having an LED light source that hardly attracts insects, and an illumination system using the illumination device.

  In general, it is known that many insects and the like have running properties toward short-wavelength light, and ultraviolet rays have an attraction peak. If the short-wavelength light as described above is included in the irradiation light from the light source of the illuminating device, the illuminating device is turned on when the surroundings are dark and the like, thereby attracting insects. Such a relationship between the light from the light source and the attractiveness of insects is shown, for example, in the correlation data between the cut wavelength and the attractive ratio shown in FIG. 20 (see, for example, Non-Patent Document 1). According to this correlation data, the attracting ratio at which insects are attracted by the irradiation light varies depending on the cut wavelength of the light source (here, a fluorescent lamp), decreases as the wavelength increases, particularly decreases rapidly to 410 nm, and approximately 600 nm. Nearly zero in the vicinity. For this reason, the reduction of insect attraction by light is usually performed by cutting a short wavelength region including ultraviolet rays, for example, up to 380 nm (case 1), up to 450 nm (case 2), and up to 600 nm (case 3). ) Which cuts each wavelength.

  In case 1, the attractiveness of insects is reduced, but light that attracts insects also exists in the visible light region, so that the low attractiveness performance is insufficient. In case 2, the insect attractability is improved. However, since the light is cut to around 450 nm in the visible light region, the illumination light looks yellow, which is not preferable for general illumination. Further, in the case 3, insects are almost completely prevented, but the irradiation light looks red, which may be uncomfortable for humans and is not suitable for general lighting.

  By the way, an LED having a light emission peak in the visible light region can be wavelength-controlled so as to emit almost no ultraviolet light unlike a fluorescent lamp or the like, and an illuminating device using such an LED as a light source has little insect attraction. However, even in this type of lighting device, light that attracts insects is present in the visible light region generated by the LED, so it cannot be said that the low attraction performance is sufficient.

  By adding the light from the second LED chip having a peak wavelength of 500 nm or more to the light from the white LED using the first LED of blue light and the yellow phosphor as this kind of illumination device, Those that reduce the attractiveness of insects are known (see, for example, Patent Document 1).

  By the way, in places where lighting devices are installed for street lights or security lights, vegetables such as rice and spinach are growing in or near the irradiation area of these lighting devices, and flowers such as chrysanthemum and carnation flowers are used. Various plants may be cultivated. In that case, the plant body is irradiated with the light emitted from the lighting device, and even if the flower that should originally bloom does not bloom, becomes malformed, or does not want to have flower buds attached, it will attach flower buds and bloom before blooming. May be affected. For example, for spinach, it has been reported that red light promotes flowering compared to blue light. As a countermeasure against the effects of night lighting on plants, the use of a lamp with a low red light spectrum is recommended. It is calculated | required (for example, refer nonpatent literature 2). Therefore, it is necessary to install an illuminating device so that the plant body is not illuminated, but if such an arrangement is not possible, for example, an illuminating device should be used to avoid irradiating the plant body. Measures such as providing an auxiliary reflector for light shielding are taken.

Matsushita Electric Works Technical Report Vol. 53No. 1 Tokyo National Agricultural Research Institute Report 1: 9-13, 2006

JP 2009-224148 A

  In the illumination device described in Patent Document 1, when the second LED chip is 500 nm or more and has a peak wavelength in red light, many insects do not see red due to their visual characteristics. There is no. In addition, when the second LED chip has yellow light as the peak wavelength, yellow light has been effective in suppressing the behavior of nocturnal moths conventionally, but other insect repellent effects have not been confirmed. There is a possibility that insect attraction cannot be reduced sufficiently. Further, since it is necessary to add LEDs having different peak wavelengths, the power consumption increases, the configuration becomes complicated, and the cost increases. Moreover, since the light emission level of red light is high, it is necessary to provide an auxiliary reflector or the like in order to avoid the effect of irradiation light on the growth of the plant body when the lighting device is arranged near the plant body, It becomes cost rise.

  The present invention has been made to solve the above problems, and in an illuminating device using an LED light source, the attracting ability of flying insects is reduced and the effect on the plant body without impairing the color tone of the irradiation light. It aims at providing the illuminating device which can perform suppression of this at low cost.

In order to achieve the above object, an illumination device of the present invention includes an LED chip that emits light having a peak wavelength in the ultraviolet or violet blue wavelength band, and a phosphor that converts the wavelength of light emitted from the LED chip. The LED light source has a bottom wavelength at which the spectrum of the emitted light from the phosphor has a light emission intensity that is at least one-tenth of the peak wavelength in a wavelength band of at least 460 nm to 540 nm. In addition, the light emission intensity is less than half of the peak wavelength in the wavelength band of at least 580 nm to 750 nm, and the spectrum of the LED light source has a substantial emission intensity at a wavelength of at least 660 nm or 710 nm. Is zero .

  In this illuminating device, the spectral spectrum of the LED light source preferably has a second peak wavelength in a wavelength band of 540 nm to 580 nm.

  In this illuminating device, the spectral spectrum of the LED light source is preferably 20 nm or more in a wavelength range where the wavelength range of the bottom wavelength is 460 nm to 540 nm.

  In this illuminating device, it is preferable that the spectrum of the LED light source has substantially zero emission intensity in a wavelength band of 380 nm or less.

  In this illumination device, the LED light source is a first LED light source, a second LED light source that emits white or light bulb color, and a case for housing the first LED light source and the second LED light source; And when irradiating an area where a plant body exists, the first LED light source is positioned in the case where the plant body is highly likely to irradiate light from the case side, It is preferable that 2 LED light sources are arrange | positioned in parts other than the said site | part.

  In this illumination device, the LED light source is a first LED light source, an LED chip that emits light having a peak wavelength in the ultraviolet or violet blue wavelength band, and at least one type that converts the wavelength of light from the LED chip. A third LED light source having a bottom wavelength in a wavelength band of at least 460 nm to 540 nm, and the first LED light source and the third LED. A case for storing a light source, and when irradiating an area where the plant body is present, the first LED light source may irradiate the plant body from the case side in the case It is preferable that the third LED light source is disposed at a portion other than the third LED light source.

  In this illumination device, the LED light source is a first LED light source, a second LED light source that emits white light, or an LED chip that emits light having a peak wavelength in the wavelength band of ultraviolet light or purple blue, and the LED A third LED light source comprising: at least one kind of phosphor that converts the wavelength of light from the chip; and a spectrum spectrum of light emitted from the phosphor having a bottom wavelength in a wavelength band of at least 460 nm to 540 nm; And a control unit for controlling the lighting of each of the LED light sources, and the control unit preferably controls the lighting so as to irradiate only from the first LED light source until a predetermined time at night.

  This lighting apparatus includes a human sensor for detecting a person, and controls the lighting apparatus to be turned on only when a human is detected at a predetermined place by the human sensor. It is preferable to be used.

  According to the illumination device of the present invention, the visible light that attracts insects is reduced in the wavelength range of 460 to 540 nm, which has a relatively small contribution to white light. The attractiveness of flying insects can be reduced at low cost without adding. In addition, since the emission intensity in the red wavelength band of 580 to 750 nm, which easily affects plant growth, is reduced, it is not necessary to provide an auxiliary reflector for shielding light to the plant, and plant growth is inexpensive. Can be avoided.

The block diagram of the illuminating device which concerns on the 1st Embodiment of this invention. The front view of an illuminating device same as the above. The perspective view of the light source part in an illuminating device same as the above. The cross-sectional block diagram of the LED part in a light source part same as the above. The enlarged view of the A section of FIG. The schematic light transmission characteristic figure of the zone | band stop type | mold wavelength cut filter in the light source part of an illuminating device same as the above. The spectral spectrum figure of the irradiation light from an illuminating device same as the above. (A) is a cross-sectional block diagram of the LED part of the illuminating device which concerns on the 2nd Embodiment of this invention, (b) is an enlarged view of the B part of (a). (A) is a cross-sectional block diagram of a high-pass blocking wavelength cut filter in the light source section of the illumination device, and (b) is a schematic light transmission characteristic diagram of the same wavelength cut filter. (A) is a cross-sectional block diagram of the LED part of the illuminating device which concerns on the 3rd Embodiment of this invention, (b) is an enlarged view of the C part of (a). The schematic light transmission characteristic figure of the zone | band stop type | mold wavelength cut filter in the light source part of an illuminating device same as the above. The spectral spectrum figure of the irradiation light from an illuminating device same as the above. (A) is a block diagram of the illumination system which concerns on the 4th Embodiment of this invention, (b) is a front view of the illuminating device of the illumination system. The front view of the illuminating device in the 1st modification of the said embodiment. (A) is a perspective view of the illuminating device used in order to measure the insect attractant, (b) is a front view of the illuminating device of the illumination system. (A) is a cross-sectional block diagram of a 620 nm band rejection type wavelength cut filter in the light source part of the illumination device of Example 1, and (b) is a schematic light transmission characteristic diagram of the same wavelength cut filter. (A) is a cross-sectional block diagram of a 485 nm band rejection type wavelength cut filter in the light source part of the illumination device of Example 3, and (b) is a schematic light transmission characteristic diagram of the same wavelength cut filter. (A) is a cross-sectional block diagram of a 660 nm band elimination type wavelength cut filter in the light source part of the illumination device of Example 8, and (b) is a schematic light transmission characteristic diagram of the same wavelength cut filter. (A) is the spectral spectrum figure of the irradiation light from the illuminating device of the comparative example 1, (b) is the spectral spectrum figure of the irradiated light from the illuminating device of the comparative example 2. FIG. The figure which shows the correlation with the cut wavelength of the light source in the conventional illuminating device, and the insect attracting ratio.

(First embodiment)
An illumination device according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the lighting device 1 includes a rectangular housing 2 having an opening on one surface and a light source unit (LED light source) 3 housed in the housing 2. The light source unit 3 includes an LED unit 4 having an LED chip and at least one kind of phosphor (details will be described later) for converting the wavelength of light emitted from the LED chip, and the housing 2 facing the opening 21. It is attached to the bottom of the inside. The LED chip emits light having a peak wavelength in a wavelength band of 200 to 380 nm of ultraviolet rays or 380 to 470 nm of purple blue. In the illumination device 1 of the present embodiment, the light source unit 3 has a light emission intensity that is one-tenth or less of the peak wavelength of the LED chip in the spectral band of the emitted light from the phosphor at least in the wavelength range of 460 to 540 nm. Has a bottom wavelength. Furthermore, the light source unit 3 is configured to have a light emission intensity of half or less with respect to the peak wavelength of the LED chip in a wavelength band of at least 600 to 750 nm, preferably at least 580 to 750 nm. In addition, the illuminating device 1 is used as a lighting fixture directly attached to a streetlight column or a ceiling surface, or a downlight embedded in a ceiling wall surface, for example, by a mounting jig. Moreover, the peak wavelength here means the maximum peak wavelength in the spectrum.

  As shown in FIG. 3, the light source unit 3 includes a substrate 31 on which a plurality of LED units 4 are arranged. The substrate 31 is a printed circuit board, a ceramic substrate, or the like, and the shape is not limited to the illustrated circle but may be a polygon. Further, the arrangement of the LED unit 4 is not limited to the central part of the substrate 31 or the like.

  As shown in FIG. 4, the LED unit 4 includes a rectangular concave frame 40 that is mounted on the substrate 31, an LED chip 41 that is mounted on the bottom surface of the frame 40, and a sealing unit that covers the LED chip 41. 42, a phosphor 5 included in the sealing portion 42, and a wavelength cut filter 6. The inside of the frame body 40 is filled with the transparent resin of the sealing portion 42 that holds the phosphor 5 and seals the LED chip 41. The phosphor 5 is a wavelength conversion material and forms an optical member that controls the wavelength of light from the LED chip 41. The wavelength cut filter 6 is an optical member that controls the transmission of light from the LED chip 41 and is located on the surface side of the sealing portion 42, and here, a band for blocking the transmission of light of a predetermined wavelength band. It is a blocking filter.

  Further, the LED chip 41 is fixed inside the frame body 40, and the light emitting surface side of the upper surface is covered with a flat front filter 7 made of a transparent member made of resin or glass. Here, the front filter 7 uses a glass member and transmits light emitted from the sealing portion 42 as it is. A wavelength cut filter 6 is disposed on the front filter 7. The frame body 40 may be a circle, an ellipse, a polygon, or the like other than a rectangle.

  The LED unit 4 emits white light based on the light from the LED chip 41 and the light obtained by wavelength-converting the light from the LED chip 41 by the phosphor 5. At this time, the spectrum of the irradiated light is formed so as to have a bottom wavelength having a light emission intensity that is one-tenth or less of the peak wavelength of the LED chip in a wavelength band of at least 460 to 540 nm. Further, the LED unit 4 is configured to have a light emission intensity of half or less of the peak wavelength of the LED chip in a wavelength band of at least 580 to 750 nm.

  When the LED chip 41 has a peak wavelength in the purple-blue (380-470 nm) wavelength band, a blue-violet light emitting element that emits purple-blue light is used, and the peak wavelength is in the ultraviolet (200-380 nm) wavelength band. In this case, an ultraviolet light emitting element that emits ultraviolet light is used. The LED chip 41 is supplied with power through a wiring pattern on the substrate 31 by a power circuit (not shown) formed on the substrate 31.

  As the blue-violet light emitting element, an InGaN blue LED chip that emits blue light (for example, Nichia, Toyoda Gosei, Epistar, Mitsubishi Chemical, etc.) is used. The material is not limited as long as it exhibits a blue peak wavelength. The LED chip 41 using the blue-violet light emitting element has a peak wavelength in a purple-blue (380 to 470 nm) wavelength band, and excites the phosphor 5 with high efficiency.

  Ultraviolet light emitting elements include InGaN ultraviolet LED chips that emit ultraviolet light (for example, Nichia Corporation, Seoul Electronics, Nitride Semiconductor, etc.), diamond chips (National Institute of Advanced Industrial Science and Technology, etc.), etc. Is used. In addition, the material will not be limited if it shows a target ultraviolet light peak wavelength. The LED chip 41 using this ultraviolet light emitting element has a peak wavelength in the wavelength band of ultraviolet rays (200 to 380 nm), and excites the phosphor 5 with high efficiency.

  The sealing portion 42 uses a transparent silicone resin as a member, and covers the LED chip 41 so as to fill the inside of the frame body 40. The sealing portion 42 is not limited to a silicone resin, and an acrylic resin (PMMA) or the like may be used, and the shape is not limited to a rectangle or the like.

  The phosphor 5 is a YAG phosphor of yttrium, aluminum, or garnet that is particularly excellent in conversion efficiency, or a silicate phosphor among the materials of the color conversion member, and is mixed in the transparent resin of the sealing portion 42. Distributedly held. Here, one or more types of phosphors 5 are combined with the LED chip 41, and the distribution spectrum of the emitted light has a target peak wavelength and bottom wavelength. Here, the phosphor 5 is formed so that the distribution spectrum of the emitted light has a bottom wavelength at which the emission intensity is one-tenth or less of the peak wavelength in a wavelength band of at least 460 to 540 nm. Further, the phosphor 5 is formed so that the distribution spectrum of the emitted light has a light emission intensity of half or less with respect to the peak wavelength of the LED chip 41 in a wavelength band of at least 580 to 750 nm.

  When the LED chip 41 is a blue-violet light emitting element, a yellow phosphor that emits yellow light by absorbing part of the blue light from the LED chip 41 is used as the phosphor 5. Here, white light is formed by the yellow light obtained by wavelength-converting the blue light of the LED chip 41 by the yellow phosphor 5 and the remaining blue light that has not been absorbed by the phosphor 5. The white LED is formed by integrating the sealing portion 42 including the phosphor 5. In addition, the phosphor 5 has a distribution spectrum of the wavelength-converted outgoing light to obtain a predetermined characteristic by selecting a fluorescent material, setting a blending ratio thereof with a silicone resin, and mixing or combining a plurality of phosphors. Configured. This distribution spectrum has a bottom wavelength that gives an emission intensity that is one-tenth or less of the peak wavelength in a wavelength band of at least 460 to 540 nm, and less than half of the peak wavelength of the LED chip in a wavelength band of at least 580 to 750 nm. It is formed to have a light emission intensity. The phosphor 5 is not limited as long as the emission wavelength can be controlled.

The phosphor 5 may be a YAG phosphor, a silicate phosphor, a silicate phosphor doped with sialon, europium, cerium, or the like when the LED chip 41 is an ultraviolet light emitting element. Those that absorb violet light and convert it into visible light are used. For example, the phosphor for ultraviolet conversion converts the wavelength of ultraviolet light from the LED chip 41 into visible light including blue light and yellow light to form white light. At this time, the phosphor is formed so that the distribution spectrum of the emitted light has a bottom wavelength at which the emission intensity is one-tenth or less of the peak wavelength in a wavelength band of at least 460 to 540 nm. Further, it is formed so that the emission intensity is less than half of the peak wavelength of the LED chip in the wavelength band of at least 580 to 750 nm. In addition, you may use the glass which carried out Cu ^{< +- >} Cu ⁺ cluster dispersion | distribution to the alkali borosilicate type | system | group glass instead of fluorescent substance as a wavelength conversion element.

  Specifically, the phosphor 5 for ultraviolet conversion is emitted by selecting the fluorescent material, adjusting the blending ratio of the fluorescent material to the silicone resin, and using a plurality of phosphors, as described above. The distribution spectrum controls the wavelength. For example, the phosphor 5 has first and second wavelength conversion elements, the first wavelength conversion element is a blue conversion element that absorbs ultraviolet rays and converts the wavelength into blue light, and the second wavelength conversion element. The element may be a yellow conversion element that absorbs blue light and converts the wavelength to yellow light in the same manner as described above. At this time, blue light from the first wavelength conversion element excited by ultraviolet rays excites the second wavelength conversion element to form white light by blue light and yellow light. Also in this case, a white LED that emits white light is formed by the LED chip 41 and the phosphor 5.

  With the phosphor 5, the light emitted from the LED unit 4 is wavelength-converted to form white light regardless of whether the light from the LED chip 41 is ultraviolet or blue-violet. In addition, as described above, the distribution spectrum has a bottom wavelength that has an emission intensity that is one-tenth or less of the peak wavelength of the LED chip in a wavelength band of at least 460 to 540 nm, and peaks in a wavelength band of at least 580 to 750 nm. The emission intensity is less than half of the wavelength. In order to obtain white light by converting the wavelength of blue light in the violet-blue wavelength band (380 to 470 nm), there is a peak wavelength at 400 to 450 nm. The luminous efficiency of the phosphor 5 is further increased. At this time, if the peak wavelength is too close to the short wavelength side, light having a wavelength of 390 nm or less is emitted due to the wavelength broadening of the LED emission. Therefore, in order to avoid this, for example, it is desirable that the peak wavelength is in the vicinity of 410 to 420 nm.

  As shown in FIG. 5, the wavelength cut filter 6 has an optical multilayer film made of a dielectric thin film in which titanium oxide and silicon oxide layers are sequentially formed on the glass substrate of the front filter 7. The wavelength cut filter 6 is formed by the optical multilayer film so as to have a predetermined wavelength cut characteristic. Here, the optical multilayer film is formed by alternately stacking up to 20 layers of titanium oxide and silicon oxide having a thickness of several hundred nm on glass. This wavelength cut filter 6 sharply lowers the spectral spectrum of the light emitted from the LED unit 4 so as to have a bottom wavelength of emission intensity that is one-tenth or less of the peak wavelength in the wavelength band of 460 to 540 nm. Therefore, it is formed as a band pass blocking type optical filter.

  The characteristics of the wavelength cut filter 6 are formed by utilizing the fact that the light transmission characteristics change due to interference between reflections generated at the interfaces between different dielectrics in the optical multilayer film. The composition, film thickness, and layer structure of the dielectric thin film in the optical multilayer film are designed by, for example, simulation using thin film design software based on the target filter characteristics, and the dielectric thin film is created by electron beam evaporation or the like. Is done. Further, the filter material is not limited as long as the wavelength can be controlled.

  FIG. 6 shows a schematic transmission characteristic of light passing through the wavelength cut filter 6. This light transmission characteristic forms a band blocking type filter characteristic that attenuates transmitted light sharply in a wavelength band of 460 to 540 nm. Since the wavelength cut filter 6 reduces the emission spectrum in the wavelength band (460 to 540 nm) between the blue light and the yellow light forming the white light, it does not affect the color tone of the white light. The wavelength cut filter 6 only needs to be provided in the light emitting direction of the LED unit 4 and may not be packaged together with the LED unit 4. The wavelength cut filter 6 may be formed as a cover member that covers a plurality of LED portions with one member. Further, in order to assist the characteristics of the wavelength cut filter 6, the phosphor 5 may have a light transmission characteristic.

  FIG. 7 shows a spectral spectrum after the irradiation light from the LED unit 4 has passed through the wavelength cut filter 6 having the above-mentioned light transmission characteristics when the LED chip 41 is a blue-violet light emitting element. This spectral spectrum has a maximum peak wavelength by the LED chip 41 in a wavelength band of about 410 to 470 nm (referred to as a first peak wavelength when distinguished from a second peak wavelength described later). Is normalized with a relative value of 1. Here, the white light from the LED unit 4 is emitted by the phosphor 5 so that the emission intensity is at least one-tenth of the peak wavelength of the LED chip in the wavelength band of at least 460 to 540 nm, and at least the wavelength band of 580 to 750 nm. And passes through the wavelength cut filter 6. After passing through the wavelength cut filter 6, the emission intensity of the bottom wavelength in the wavelength band of about 490 to 540 nm is substantially zero, and is one-tenth or less of the peak wavelength of the LED chip in the wavelength band of 460 to 540 nm. The wavelength range width of the bottom wavelength that becomes the emission intensity is 20 nm or more. The LED unit 4 has a second peak wavelength having a light emission intensity of approximately 80% with respect to the light emission intensity of the first peak wavelength in the wavelength band of 540 to 580 nm.

  In addition, when the LED chip 4 is an ultraviolet light-emitting element, the LED unit 4 has a bottom that has a light emission intensity that is one-tenth or less of the peak wavelength of the LED chip in a wavelength band of at least 460 to 540 nm, as described above. It is formed to have a wavelength. Furthermore, it is formed so that the emission intensity is less than half of the peak wavelength in the wavelength band of at least 580 to 750 nm. Note that the wavelength cut filter 6 may sharply reduce the irradiation light from the LED chip 41 in the wavelength band of 460 to 540 nm. The LED unit 4 includes a plurality of phosphors 5 that absorb ultraviolet rays and convert wavelengths into red, green, and blue light, respectively, and form white light by RGB emitted light from these phosphors. The wavelength band of 460 to 540 nm of incident light may be blocked by the wavelength cut filter 6.

  According to the present embodiment, the irradiation light from the light source unit 3 is formed so as to have a bottom wavelength that has an emission intensity that is one-tenth or less of the peak wavelength of the LED chip 41 in a wavelength band of at least 460 to 540 nm. . As a result, part of the light in the visible light region that attracts insects can be suppressed, so that the attractability of flying insects can be reduced. The bottom wavelength band of 460 to 540 nm is between blue light in the wavelength band of 380 to 460 nm and yellow light (for example, around 560 to 600 nm). Accordingly, there is little influence on the emission intensity of blue light and yellow light, and the color tone of white light due to the light can be hardly changed. Furthermore, the irradiation light from the light source unit 3 is configured to have a light emission intensity that is half or less of the peak wavelength of the LED chip 41 in a wavelength band including red light of 580 to 750 nm. Is reduced, and the influence on plant growth can be suppressed. Further, it is not necessary to add an LED chip having a peak wavelength other than blue light to the LED unit 4 or an auxiliary reflector for avoiding irradiation to a plant body. Therefore, the attractiveness of flying insects can be reduced without impairing the color tone of the irradiating white light, the influence on the growth of the plant body can be suppressed, and the cost can be reduced with a simple configuration. In addition, this embodiment can be used for all the illuminating devices which use a LED light source.

  Further, the spectral spectrum of the light source unit 3 has the second peak wavelength in the wavelength band of 540 to 580 nm, thereby increasing the level of yellow light obtained by wavelength conversion by the phosphor 5 and obtaining brighter white light. . Moreover, since the wavelength range width which becomes a bottom wavelength in the wavelength range of 460 to 540 nm is 20 nm or more, the attractiveness of flying insects can be further reduced. In addition, in the case where the irradiation light from the light source unit 3 is configured to have a light emission intensity of half or less of the peak wavelength of the LED chip 41 in a wavelength band including red light of 600 to 750 nm, The influence on the growth of the body can be suppressed.

(Second Embodiment)
An illumination device according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 8 (a) and 8 (b), in the present embodiment, in the light source unit 3 of the above embodiment, light on the front side of the LED unit 4 and further on the short wavelength region (high region) side of 380 nm or less. A high-frequency blocking type wavelength cut filter 8 for blocking transmission is provided. In the present embodiment, the light from the LED unit 4 is transmitted through the wavelength cut filter 8 so that the emission intensity of the spectrum of the emitted light is substantially zero in a short wavelength band of 380 nm or less.

  The wavelength cut filter 8 uses, for example, a transparent member such as acrylic (PMMA), polycarbonate resin, or glass. Here, the wavelength cut filter 8 is formed by forming the front filter 7 of the LED unit 4 with a transparent acrylic resin, and at least an ultraviolet absorber (for example, manufactured by Ciba: Tinuvin 326, etc.), a dye, a pigment, or the like is added to the acrylic resin. Add agent 9. With this addition, the wavelength cut filter 8 cuts the short wavelength band side of 380 nm or less, and controls the transmission wavelength so as to transmit light in the other visible light region. In addition, it is desirable to use the ultraviolet absorber for the additive 9 in view of durability and color tone.

  Further, as shown in FIGS. 9A and 9B, the wavelength cut filter 8 is formed by laminating an optical multilayer film on a resin or glass, and the short wavelength band side of 380 nm or less by the optical filter design as described above. It can also be formed by cutting. This wavelength cut filter 8 is composed of a 10-layer optical multilayer film laminated on a transparent acrylic resin plate 7a provided on the wavelength cut filter 6 of the LED section 4, and its light transmission characteristics are steep in the vicinity of 410 nm. And is formed so as to cut the short wavelength region. The wavelength cut filter 8 uses a glass material as its member, and has the above-described high-frequency blocking type light transmission characteristics by translucent glass made of borosilicate or phosphoric acid to which a halide or the like is added. You may form so that it may obtain. In addition, the high-frequency cutoff type wavelength cut filter 8 may be integrated with the band-rejection type wavelength cut filter 6, and the material and method are not limited as long as the wavelength can be controlled. Absent.

  Here, in the light source unit 3, when the LED unit 4 uses a blue-violet light emitting element having a peak wavelength of 380 to 470 nm for the LED chip 41, it emits ultraviolet light of 380 nm or less. The emission of the ultraviolet rays can be suppressed. In addition, since this blue-violet light emitting element also emits a lot of light in the vicinity of 400 to 420 nm, the emission spectrum of the irradiation light from the LED unit 4 is changed from the emission intensity of 405 nm or less to the emission intensity of the peak wavelength by the wavelength cut filter 8. Compared to 50% or less, it is desirable. Further, the LED chip may be controlled so that the LED chip itself does not emit light at 380 nm or less by controlling the composition of the element.

  Further, when the LED unit 4 uses an ultraviolet light emitting element for the LED chip 41, it is difficult to absorb the ultraviolet irradiation light only with the phosphor 5 and convert all of it into light in the visible light region, The remaining ultraviolet rays are irradiated. Also in this case, the wavelength cut filter 8 blocks the irradiation light from the LED unit 4 at a wavelength of 380 nm or less, and the emission spectrum in the ultraviolet region is cut, so that the irradiation of ultraviolet rays from the light source unit 3 is suppressed.

  According to this embodiment, even if the LED chip 41 is either an ultraviolet ray or a blue-violet light emitting element, the irradiation light from the light source unit 3 is cut by the wavelength cut filter 8 on the short wavelength band side of 380 nm or less. The ultraviolet region of the emission spectrum is reduced. Thereby, the attractiveness of the flying insect is further reduced, and the influence on the plant body by irradiation light including ultraviolet rays can be reduced. Note that when the wavelength cut filter 8 is formed by adding the additive 9 to an acrylic resin, an optical multilayer film is not used, and therefore, the wavelength cut filter 8 can be manufactured at a low cost.

(Third embodiment)
An illumination device according to a third embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 10A, the illuminating device 1 of the present embodiment substantially has a wavelength of at least 660 nm on the front side of the wavelength cut filter 6 of the LED unit 4 in the light source unit 3 of the embodiment. A band-stopping type wavelength cut filter 10 for zeroing is further provided. In the first embodiment, the emission intensity of the spectral spectrum of the light source unit 3 is substantially zero at a wavelength of at least 660 nm or 710 nm in the first embodiment.

  The wavelength cut filter 10 controls the wavelength so as to obtain the above filter characteristics, for example, by adding at least a dye or a pigment to acrylic or polycarbonate resin. Also, as shown in FIG. 10B, the wavelength cut filter 10 is configured so that an optical multilayer film is laminated on a transparent acrylic resin or glass so as to obtain a pass characteristic that cuts a target wavelength. be able to.

  FIG. 11 shows a schematic transmission characteristic of light passing through the wavelength cut filter 10 using the optical multilayer film. This light transmission characteristic forms a rough band-passing type optical filter characteristic in which the emission intensity in the wavelength band of at least 660 nm centered at 660 nm is substantially zero.

  FIG. 12 shows a spectral spectrum after the irradiation light from the LED unit 4 is transmitted through the wavelength cut filter 10 having the light transmission characteristics when the LED chip 41 is a blue-violet light emitting element. In the spectral spectrum of the present embodiment, the emission intensity in the wavelength band of approximately 620 to 710 nm is substantially zero. Thereby, since the emitted light intensity of red light can be reduced, the influence on a plant body can be suppressed. In order to reduce the influence of the irradiated light on the plant body, in the characteristics of the emission spectrum, it is most desirable that the emission intensity in the wavelength region of red light of 580 to 710 nm is substantially zero as much as possible. In the present embodiment, characteristics close to that were obtained.

(Fourth embodiment)
An illumination system according to a fourth embodiment of the present invention will be described with reference to FIGS. The illumination system of the present embodiment includes an illumination device 1 having a plurality of LED light sources and a human sensor 11 arranged around the illumination device 1. The lighting system controls the lighting device 1 to be turned on when a person enters a predetermined area based on the human detection signal detected by the human sensor 11, and uses a plurality of LED light sources. Make the lighting in the outdoors brighter.

  The illuminating device 1 uses the light source unit 3 of the embodiment as the first light source unit 3, and in addition to this, a second light source unit 3a (LED light source) having an LED unit 4a that emits white or light bulb color, 1 and a case 2a for housing the second light source units 3 and 3a. Moreover, the illuminating device 1 has the control part 32 which has a microcomputer etc. with a built-in timer, and the control part 32 controls lighting of the 1st, 2nd light source parts 3 and 3a of the illuminating device 1 with the whole illumination system. The illuminating device 1 is attached to a streetlight pole 100 in which the case 2a is erected on a street or the like by an attachment member 30, and can be used as a streetlight or a crime prevention light.

  As described above, the first light source unit 3 is a light source capable of suppressing insect attractivity, reducing the emission intensity of red light, and reducing the influence on the plant body. The second light source unit 3a emits white or a light bulb color, is a light source that has higher insect attractivity and has a large emission intensity of red light and a large influence on the plant body compared to the first light source unit 3. is there. Therefore, in the lighting device 1, as a countermeasure when the plant body 50 exists near the lighting device 1, the first light source unit 3 can irradiate the plant body 50 with light from the case 2 a side in the case 2 a. It arrange | positions in the site | part which becomes easy to irradiate light to the plant body 50 more easily in the site | part 2a, and arrange | positions the 2nd light source part 3a in the part in case 2a other than the site | part. ing.

  The case 2a includes a rectangular housing 22 having an opening for irradiation, and the light source units 3 and 3a are disposed on a common circuit board (not shown) fixed to the bottom surface side in the housing 22; The outside is irradiated from the opening of the housing 22. A control unit 32 is provided on the circuit board. In addition, the light source parts 3 and 3a are good also as a common circuit board by integrating each circuit board 31 (refer FIG. 4) in which those LED parts 4 and 4a are mounted. Note that the case 2a may be a casing having another shape such as a polygon or a circle instead of a rectangle.

  In the illuminating device 1, when the first light source unit 3 and the second light source unit 3a are compared, the first light source unit 3 suppresses the insect attractant and emits red light as described above. It is a light source that can reduce the intensity and reduce the impact on plants. On the other hand, the second light source unit 3a emits white or a light bulb color, has higher insect attractivity than the first light source unit 3, and has a large emission intensity of red light, which affects the plant body. Is a large light source. Therefore, in the lighting device 1, the light source unit 3 is arranged at a position where there is a high possibility of irradiating the plant body 50 in order to suppress the influence of the irradiation light on the growth of the plant body 50, and the second light source unit 3 a. Is arranged at a position where the possibility of irradiating the plant body 50 is low.

  Here, in consideration of the case where the plant body 50 exists near the pole 100, the first light source unit 3 may irradiate the plant body 50 when the lighting device 1 is attached to the pole 100. It is arranged near the pole 100 in 2a. Moreover, the 2nd light source part 3a is arrange | positioned in the case 2a in the side away from the pole 100 so that the irradiation to the plant body 50 may decrease. The second light source unit 3a may control the light distribution in advance, for example, by changing the direction of the irradiation light so as to illuminate the street with less irradiation to the plant body 50.

  According to the present embodiment, when used in a street light, a security light, etc., even if there is a plant nearby, the surroundings of the street are illuminated brightly without affecting the growth of the plant 50 by irradiation light. can do. Moreover, since it lights only when the person M is detected, useless lighting can be omitted, the irradiation time to the plant body 50 is reduced, and the influence on the plant body 50 can be suppressed. The lighting device 1 may include a plurality of first and second light source units 3 and 3a. In addition, the human sensor 11 may be located away from the lighting device 1.

(First modification)
A lighting device of a first modification according to the fourth embodiment will be described with reference to FIG. The illuminating device 1 of this modification is the illuminating device according to the above-described embodiment, instead of the second light source unit 3a, a third light source in which the spectrum of the emitted light has a bottom wavelength in a wavelength band of at least 460 to 540 nm. The unit 3b is provided.

  The third light source unit 3b includes an LED chip that emits a peak wavelength in the ultraviolet or violet blue wavelength band, and an LED unit that includes at least one phosphor that converts the wavelength of light emitted from the LED chip. 4b. The LED unit 4b converts the wavelength of light emitted from the LED chip by the phosphor, and the spectrum of the emitted light has a bottom wavelength in a wavelength band of at least 460 to 540 nm. Therefore, since the third light source unit 3b can suppress part of the light in the visible light region that attracts insects, similarly to the first light source unit 3, it can reduce the attractability of flying insects. . According to this modification, in addition to the attractiveness of flying insects being reduced by the first light source unit 3, the attractiveness of flying insects can also be reduced by the third light source unit 3b. Increase more.

(Second modification)
A lighting device according to a second modified example of the fourth embodiment will be described. The lighting device 1 of the present modification includes the second light source unit 3a or the third light source unit 3b described above in addition to the first light source unit 3, and the control unit 32 uses a timer until a predetermined time at night. It controls so that only the 1st light source part 3 is lighted. Here, the predetermined time is, for example, 22:00 at night. Until then, only the first light source unit 3 is turned on, and the second light source unit 3a or the third light source unit 3b is turned off. The influence on the growth of the plant body by irradiation light can be suppressed.

  Next, the insect attractant evaluation will be described by comparing Examples 1 to 8 according to the above-described embodiment with Comparative Examples 1 to 3 (not the embodiment). As shown in FIGS. 15 (a) and 15 (b), the illumination devices 1 in Examples 1 to 8 and Comparative Examples 1 to 3 are in the shape of a downlight mounted in the horizontal direction, and the light from the light source unit 3 is a housing. It attached to the pole 100 of the center part of a room so that it might irradiate from the opening 21 of 2 horizontally. The light source unit 3 is provided with a black panel (wood) 12 on the light irradiation surface of the opening 21 of the housing 2, a hole is formed in the black panel 12, and the light source unit 3 is installed in the housing 2 so as to emit light from the hole. . The opening 21 of the housing 2 has a size of about 500 mm square, and an adhesive trap sheet 13 for trapping insects having a size of width 200 × length 500 mm so as to block a part of the opening 21 on the upper and lower ends thereof. Each was attached. The light from the light source unit 3 was irradiated only from the opening 21 side between the adhesive trap sheets 13. Here, the light source unit 3 uses eight LEDs. The lighting device was fixed using a Panasonic Electric Works downlight (NNN21615 shape).

(Measuring method)
The spectral spectrum from the illumination device was measured using an instantaneous multi-photometry system (MCPD3000: manufactured by Otsuka Electronics Co., Ltd.), and the peak wavelength and the bottom wavelength region of the emission intensity were measured. The ratio of the emission intensity between the peak wavelength and the bottom wavelength was calculated with the emission intensity at the peak wavelength being 10.

(Evaluation method)
The insecticidal evaluation for attracting insects was performed by separating 400 insects of 3 types (fly, snapper, etc.) each in a 10 m square room, and evaluating the number of insects captured after 1 hour. Here, the total number of insects captured in Comparative Example 2 was set to 100, and this was used as a reference value for relative comparison. The insect attractant evaluation method performed in this way is referred to herein as A-type insect attractant evaluation method.

  The evaluation results measured under the above conditions are shown in Table 1 below. Table 1 shows examples and comparative examples in the column. In addition, the first peak wavelength, the second peak wavelength, the bottom wavelength region whose emission intensity is 1/10 with respect to the first peak wavelength, the presence or absence of a cut filter having a short wavelength or less, and 660 nm or 710 nm The luminescence intensity is zero, the insect attractivity, and the color tone evaluation. Moreover, color tone evaluation irradiated the light from the illuminating device of a downlight shape to the white board, and visually evaluated the color tone. In this visual evaluation, when the color looks white / bulb color (white or bulb range), “white” or bulb color appears “no significant color change (slightly yellowish, reddish) The case of “is not strong even if it exists” ”is marked as“ Good ”. In addition, a slight color difference can be recognized, but a case where the color is not significantly changed (extreme yellow, red, blue, etc.) is indicated by Δ, and a case where yellow or red appears strong is indicated by ×. In Table 1, the peak wavelength of the LED chip is the first peak wavelength, the first peak wavelength is wavelength-converted, and the peak wavelength that is longer than the first peak wavelength is the second peak wavelength. .

Example 1
In the illumination device in Example 1, in the first embodiment, 620 nm is formed on the front surface of a white LED using an LED chip having a first peak wavelength of 455 nm (manufactured by Cree, USA) and a phosphor such as a yellow system. A wavelength cut filter having a bottom wavelength is provided. As shown in FIGS. 16 (a) and 16 (b), this wavelength cut filter 14 is a band-blocking filter that reflects an optical band around 620 nm by forming an optical multilayer film on a transparent weather-resistant acrylic resin substrate. Formed. The spectrum obtained at this time has the same characteristics as the spectrum of the first embodiment shown in FIG. 7, and has a bottom emission intensity that is at least one-tenth of the peak wavelength in the wavelength band of 460 to 540 nm. The emission intensity is at least half of the peak wavelength in a wavelength band of at least 580 to 750 nm. As a result, the insect attractivity was 85, which was below the reference value (100), making it difficult to attract flying insects. In the color tone evaluation, a slight color difference could be recognized with “Δ”, but there was no significant color change. In Examples 1 to 8, the color tone evaluations were all “Δ”.

(Example 2)
The illumination device in Example 2 used the white LED chip (manufactured by Epistar) having a peak wavelength of 440 nm in Example 1 above. As a result, the insect attractivity was 75, which was lower than that of Example 1.

(Example 3)
As shown in FIGS. 17 (a) and 17 (b), the illumination device in Example 3 is formed by forming an optical multilayer film on the acrylic resin substrate in Example 2 above, and the emission intensity at 485 nm is substantially zero. The band rejection type wavelength cut filter 15 is further provided. As a result, the insect attractivity was 70, which was reduced from that of Example 2.

Example 4
The illumination device in Example 4 was configured in Example 3 so that the same peak wavelength (455 nm) as in Example 1 was obtained, and the second peak wavelength was 580 nm. At this time, the wavelength region where the emission intensity of the bottom wavelength with respect to the first peak wavelength becomes 1/10 has a bandwidth of 480 to 500 nm and a bandwidth of 20 nm. As a result, the insect attractivity was 65, which was reduced compared to Example 3.

(Example 5)
The illuminating device in Example 5 has the same first peak wavelength as that of Example 1 in Example 4, and the wavelength region in which the emission intensity of the bottom wavelength with respect to the first peak wavelength becomes 1/10 is 480 to 500 nm. The bandwidth is 20 nm. As a result, insect attractivity was 78, which was reduced from that of Example 1.

(Example 6)
In the illumination device in Example 6, the peak wavelength of the LED chip in Example 1 was shortened from 455 nm to 410 nm. As a result, the insect attractivity was 81, which was reduced from that in Example 1.

(Example 7)
The illuminating device in Example 7 is provided with a wavelength cut filter 8 (see FIG. 9) that cuts a wavelength of 380 nm or less in the ultraviolet region of 365 nm in the first peak wavelength by the LED chip in Example 1, and emits light. The emission intensity of ultraviolet rays was reduced. As a result, the insect attractivity was 83, which was reduced from that in Example 1.

(Example 8)
As shown in FIGS. 18 (a) and 18 (b), the illuminating device in Example 8 is a band-blocking type that is formed by forming an optical multilayer film on an acrylic resin substrate and has a bottom wavelength of 660 nm as shown in FIGS. A wavelength cut filter 10 was further provided. At this time, the spectrum similar to the spectrum of the third embodiment shown in FIG. 12 was obtained. That is, there is a second peak wavelength at 580 nm, a bottom wavelength that is zero between 460 nm and 540 nm, and the emission intensity at a wavelength of 660 nm is substantially zero. As a result, the insect attractivity was 60, which was the smallest value in the examples.

(Comparative Example 1)
The lighting device of Comparative Example 1 was configured by changing the peak wavelength of the LED chip to 470 nm and changing the blending of the plurality of phosphors in Example 1 above. In this case, as shown in FIG. 19 (a), the spectral spectral characteristics of the emitted light are such that the peak wavelength is as long as 470 nm, and the emission intensity between 460 and 540 nm is 1/10 or less of the peak wavelength. There is no wavelength region. As a result, the insect attractivity was 120, exceeding the standard value. The color tone evaluation was “good”.

(Comparative Example 2)
The illumination device of Comparative Example 2 has a configuration in which the wavelength cut filter using the optical multilayer film is omitted from the above Example 1. In this case, as shown in FIG. 19B, the spectrum of the emitted light is a bottom wavelength where the emission intensity is 1/10 or less of the peak wavelength between 460 and 540 nm with respect to the peak wavelength of 455 nm. The area does not exist. The number of insects captured in Comparative Example 2 was defined as 100, which was used as a reference value for insect attractivity. The color tone evaluation was “good”.

(Comparative Example 3)
The lighting device of Comparative Example 3 was configured by changing the blending ratio of the plurality of phosphors in Example 1 above. Here, the first peak wavelength was 455 nm, and the second peak wavelength was 620 nm. As a result, the insect attractivity was 138, exceeding the standard value. The color tone evaluation was ◎.

  As can be seen from the above evaluation results, in Examples 1 to 8, the insect attractant has a reference value (100) regardless of whether the light emitted from the LED chip has a peak wavelength in any wavelength region of ultraviolet light or purple blue light. It was as follows, and was able to be reduced from Comparative Example 2. Further, in Example 8, the second peak wavelength is present at 580 nm, and the wavelength band in which the emission intensity of the bottom wavelength is 1/10 with respect to the first peak wavelength is present between 460 and 580 nm, Moreover, since it became zero at 660 nm, the insect attractivity could be lowered particularly. In the color tone evaluation, although slight color differences could be recognized, there was no significant color change.

  Next, in contrast to Examples 9 and 10 according to the above-described embodiment and Comparative Example 4 (not the embodiment), the evaluation of the influence on the plant body and a method different from the above-described A-type worm evaluation method ( Here, the insect attractant evaluation by the B method attractant evaluation method) will be described.

  The insecticidal B-type insect repellent evaluation method is an outdoor evaluation method. In an open space in a mountainous area, a lighting device equipped with a trapping adhesive trap sheet is set to a height of 2 meters (10 m) and 10 m Two sets were arranged at intervals, and the arrangement was changed for each other for four days. Here, the number of traps was measured by arranging the adhesive trap sheet in the same manner below each lighting fixture. The insect attractivity was evaluated by comparing the total number of insects captured in Comparative Example 4 with a reference value of 100.

  In the evaluation of the influence on the plant body, the lighting devices of Examples 9, 10 and Comparative Example 4 were set in the greenhouse in the same manner as the arrangement in the B-type insect repellent evaluation method, and turned on for one month. A chrysanthemum in a state before blooming was placed near the device, and its growing state was observed. Here, in the evaluation of the influence on the plant body, a case where there is almost no influence on the growth of flower buds, and a case where there is an influence on the growth of flower buds are indicated as x. The evaluation results measured under the above conditions are shown in Table 2 below. Table 2 shows Examples and Comparative Examples in the vertical column, and insect insect attractivity, effects on plants, and measurement conditions in the horizontal column.

Example 9
The illuminating device of Example 9 is the same as the illuminating device of Embodiment 5 described above, except that the first light source unit 3 and the second light source unit 3a are all the same as the first light source unit 3 of Example 4. Only part 3 was irradiated. Here, lighting control was performed in which the irradiation time of the lighting device was set to 22:00 at night. As a result, the insect attractant value (55) was as low as about half that of Comparative Example 4, and there was almost no effect on plants, and the evaluation was good.

(Example 10)
The illuminating device of Example 10 has the same configuration as the illuminating device of Example 9, and as a measurement condition, lighting control is performed so that a human sensor detects a person entering the greenhouse during measurement and turns on the lighting device. The lighting time of 1 was set to 3 minutes, and the lighting frequency was 5 times. As a result, the insect attractant value was lower than that of Example 9, and there was almost no effect on plants, and the evaluation was good.

(Comparative Example 4)
The illuminating device of Comparative Example 4 is the same as the illuminating device of Example 9, except that the first light source unit 3 and the second light source unit a all have the same light emission characteristics as the light source unit of Comparative Example 2. Only the second light source unit 3a is turned on at night. As a result, the evaluation of the influence on the plant was x. As described above, it was found that each of Examples 9 and 10 was superior to Comparative Example 4 in terms of insect attractivity and hardly affected plant growth.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, the light source unit of each of the above embodiments may be integrated with a wavelength cut filter, a phosphor, and a seal part. In addition, the sealing part may cover the LED chip as a cap type shape without being filled in the frame body, and it may have a bullet shape, a semi-spherical shape, etc. in addition to the cap type, and a condensing lens in itself. A function may be provided. Further, the sealing portion may be formed of two or more resin layers each including different phosphors, and the resin layers may be laminated to cover the LED chip. Moreover, the illuminating device of each embodiment can be used not only for downlights but also for exterior illuminators such as street lamps, illuminators for base lights, etc., as long as it uses an LED light source.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2a Case 3 Light source part (1st light source part) (LED light source)
3a Second light source unit (LED light source)
3b 3rd light source part (LED light source)
32 Control part 4, 4a, 4b LED part 41 LED chip 5 Phosphor 11 Human sensor 50 Plant M Person

Claims (8)

An LED light source using an LED chip that emits light having a peak wavelength in the ultraviolet or violet blue wavelength band, and a phosphor that converts the wavelength of light emitted from the LED chip,
The LED light source has a bottom wavelength in which a spectrum of light emitted from the phosphor has a light emission intensity that is not more than one tenth of the peak wavelength in a wavelength band of at least 460 nm to 540 nm, and at least 580 nm to 750 nm. half the peak wavelength in a wavelength band of configured to be equal to or less than the emission intensity,
The illumination apparatus according to claim 1, wherein the spectral spectrum of the LED light source has a light emission intensity of substantially zero at a wavelength of at least 660 nm or 710 nm .   2. The illumination device according to claim 1, wherein the spectral spectrum of the LED light source has a second peak wavelength in a wavelength band of 540 nm to 580 nm.   3. The illumination device according to claim 1, wherein the spectrum of the LED light source has a wavelength range width of the bottom wavelength of 20 nm or more in a wavelength band of 460 nm to 540 nm.   4. The illumination device according to claim 1, wherein the spectral spectrum of the LED light source has a light emission intensity of substantially zero in a wavelength band of 380 nm or less. 5. The LED light source is a first LED light source,
A second LED light source that emits white or light bulb color;
A case for housing the first LED light source and the second LED light source;
When irradiating an area where a plant body is present, the first LED light source is positioned in the case where there is a high possibility of irradiating the plant body from the case side, and the second LED light source is The illumination device according to claim 1, wherein the illumination device is disposed in a portion other than the portion . The LED light source is a first LED light source,
An LED chip that emits light having a peak wavelength in the ultraviolet or violet-blue wavelength band, and at least one phosphor that converts the wavelength of the light from the LED chip, the light emitted from the phosphor A third LED light source having a bottom wavelength in a wavelength band of at least 460 nm to 540 nm ;
A case for housing the first LED light source and the third LED light source,
When irradiating an area where a plant body is present, the first LED light source is positioned in the case where there is a high possibility of irradiating the plant body with light from the case side, and the third LED light source is lighting device according to any one of claims 1 to 4, characterized in that it is arranged in the other parts position. The LED light source is a first LED light source,
A second LED light source that emits white light, or an LED chip that emits light having a peak wavelength in the ultraviolet or violet blue wavelength band, and at least one phosphor that converts the wavelength of light from the LED chip A third LED light source having a bottom wavelength in a wavelength band of at least 460 nm to 540 nm, and a spectral spectrum of light emitted from the phosphor,
A control unit for controlling the lighting of each LED light source,
The lighting device according to any one of claims 1 to 4 , wherein the control unit performs lighting control so that irradiation is performed from only the first LED light source until a predetermined time at night .   A lighting device according to any one of claims 1 to 7 and a human sensor for detecting a person,
  The lighting system is characterized in that the lighting device is controlled to be turned on only when a person is detected in a predetermined area by the human sensor.

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