JP2017016798A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of suppressing a presence in an attachment section such as a ceiling and realizing a natural space while preventing glare.SOLUTION: A lighting fixture 1 installed in an attachment section such as a ceiling 90, comprises: a fixture body 2 including a light source section 10 and a reflection section 20 having a second opening portion 22; and a frame section 30 disposed between the fixture body 2 and the ceiling 90, light from the light source section 10 being emitted from the second opening portion 22 of the reflection section 20 and emitted to outside through an internal space of the frame section 30, and an internal surface of the frame section 30 being not located on an optical path of the light emitted from the second opening portion 22 of the reflection section 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lighting fixture.

  Lighting fixtures such as downlights that are designed for use in stores and the like are generally installed in a state of being embedded in the ceiling. The downlight includes a light source part having an LED (Light Emitting Diode), a tool body part having a reflecting part for controlling light distribution from the light source part, and a frame part for holding the tool body part on the ceiling And. Such a downlight is embedded in the ceiling in a state where the frame body portion substantially coincides with the ceiling surface.

  For lighting fixtures such as downlights, it is required to suppress glare or make the presence on the ceiling inconspicuous. For this reason, in the conventional downlight, in order to suppress the brightness | luminance of a reflection part, the reflection part by which the mirror surface process was given to the inner surface is employ | adopted (patent document 1, patent document 2). Furthermore, there has been proposed a lighting fixture having a reflecting portion with a higher specularity so that the lighting fixture is not reflected on a surrounding window glass or the like.

Japanese Utility Model Publication No. 62-123012 JP 2008-016417 A

  However, in conventional downlights, as a result of adopting a reflective portion whose inner surface (reflecting surface) is a mirror surface, what is present around the downlight is reflected in the mirror surface, and the lighting fixture at the mounting portion such as the ceiling As a result, a new problem has emerged that makes it stand out.

  The present invention has been made to solve such a problem, and provides a lighting apparatus capable of realizing a natural space while preventing glare and suppressing presence in a mounted portion such as a ceiling. The purpose is to do.

  In order to achieve the above object, one aspect of a lighting fixture according to the present invention is a lighting fixture installed in a mounted portion, and a fixture main body having a light source portion and a reflecting portion having an opening, A frame body part disposed between the instrument main body part and the attached part, and light from the light source part exits from the opening of the reflection part and passes through the internal space of the frame body part. The inner surface of the frame body portion is not positioned on the optical path of the light that passes through and exits from the opening of the reflecting portion.

  While preventing glare, it is possible to realize a natural space by suppressing the presence in the mounted portion such as the ceiling.

It is sectional drawing which shows typically the lighting fixture which concerns on embodiment. It is a schematic diagram which shows a state when the lighting fixture of a comparative example is installed in the indoor ceiling. It is a schematic diagram which shows a state when the lighting fixture which concerns on embodiment is installed in the indoor ceiling. It is sectional drawing which shows the lighting fixture which concerns on the modification 1 typically. It is sectional drawing which shows typically the lighting fixture which concerns on the modification 2. As shown in FIG. It is sectional drawing which shows the lighting fixture which concerns on the modification 3 typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Accordingly, numerical values, shapes, materials, components, arrangement positions and connection forms of components shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
The lighting fixture 1 which concerns on this Embodiment is installed in to-be-attached parts, such as the ceiling of buildings, such as a house, for example. As an example, the luminaire is an embedded luminaire such as a downlight that illuminates light downward (floor, ground, wall, etc.) by being embedded in a ceiling. FIG. 1 is a cross-sectional view schematically showing a lighting fixture 1 according to the embodiment, and shows the lighting fixture 1 installed on a ceiling 90.

  The lighting fixture 1 includes a fixture main body 2 having a light source unit 10 and a reflection unit 20, a frame body 30, and a base 40. In the present embodiment, the base 40 is also a part of the instrument main body 2. That is, the instrument main body 2 includes not only the light source unit 10 and the reflection unit 20 but also the base 40. In addition, the instrument main-body part 2 may contain members other than these. Hereinafter, each component of the lighting fixture 1 will be described in detail.

[Light source]
The light source unit 10 is an LED light source (LED module) having LEDs. The light source unit 10 is, for example, a white LED light source that emits white light. In the present embodiment, the light source unit 10 has a COB (Chip On Board) structure, and includes a substrate, a plurality of LEDs mounted on the substrate, and a sealing member that seals the LEDs.

  The substrate is a mounting substrate for mounting the LED, and is, for example, a ceramic substrate, a resin substrate, a metal base substrate, or the like. The substrate is formed with a pair of electrode terminals for receiving DC power for causing the LED to emit light from the outside and a metal wiring having a predetermined pattern for electrically connecting the LED.

  An LED is an example of a light emitting element, and in this embodiment, an LED is a bare chip that emits monochromatic visible light. The LED is, for example, a blue LED chip that emits blue light when energized. For example, a plurality of LEDs are arranged in a matrix on a substrate, are formed on the substrate, and are electrically connected to each other by metal wiring. Note that at least one LED may be arranged.

  For example, a translucent resin is used as the sealing member. The sealing member in this Embodiment contains the fluorescent substance as a wavelength conversion material which wavelength-converts the light from LED. The sealing member is, for example, a phosphor-containing resin in which a phosphor is dispersed in a silicone resin. As the phosphor particles, when the LED is a blue LED that emits blue light, for example, a YAG yellow phosphor can be used to obtain white light. In the present embodiment, the sealing member is formed in a circular shape so as to collectively seal all LEDs, but a plurality of LEDs may be sealed in a line shape for each column, and each LED may be sealed. May be individually sealed.

  The light source unit 10 is fixed to the base 40 by an attachment member such as a screw or a holder. The light source unit 10 is electrically connected to a power supply device (not shown). Specifically, the electrode terminal of the substrate of the light source unit 10 and the output terminal of the power supply device are connected by a lead wire or the like. The power supply device converts, for example, AC power from an external power source such as a commercial power source into DC power of a predetermined level by rectification, smoothing, and stepping down, and supplies the DC power to the light source unit 10.

[Reflection part]
The reflector 20 is a cylindrical reflector (reflector), and includes a first opening 21 through which light from the light source unit 10 enters and a second opening 22 through which light incident from the first opening 21 exits. Have The first opening 21 is an opening located at the end of the reflection unit 20 on the light source unit 10 side. On the other hand, the second opening 22 is an opening located at the end of the reflecting unit 20 on the frame body 30 side.

  The first opening 21 is formed so as to surround the light source unit 10. The size of the opening of the second opening 22 is larger than the size of the opening of the first opening 21. In the present embodiment, the reflecting portion 20 has a funnel shape on the inner surface so that the inner diameter gradually increases from the first opening 21 toward the second opening 22.

  The inner surface of the reflection unit 20 is a reflection surface that reflects light from the light source unit 10. The inner surface of the reflecting portion 20 may be either a flat surface or a curved surface. In the present embodiment, the reflection unit 20 has a light distribution control function, and controls the light emitted from the light source unit 10 to travel at a predetermined spread angle α. That is, the reflection unit 20 functions as a main reflection plate (main reflection member) of the lighting fixture 1. Specifically, the shape of the inner surface (reflecting surface) of the reflecting portion 20 is formed so that light emitted from the second opening 22 of the reflecting portion 20 passes through the inside of the frame body portion 30 with a predetermined spread angle α. Has been.

  The spread angle α of the light emitted from the reflection unit 20 is, for example, the end of the light emitting unit of the light source unit 10 (point A in FIG. 1) and the end of the opening surface of the second opening 22 of the reflection unit 20 (FIG. 1). Determined by a line connecting the point B). In the present embodiment, the spread angle α of the light emitted from the reflection unit 20 is determined by the outermost light of the light emitted from the reflection unit 20. In addition, the edge part of the light emission part of the light source part 10 is an edge of a sealing member (phosphor containing resin), for example.

  The reflection unit 20 is a white resin part made of a hard resin material such as PBT (polybutylene terephthalate) or a metal part made of a metal material such as aluminum. In addition, in order to improve reflectivity, you may form white coating or a metal vapor deposition film (metal reflection film) on the inner surface of the reflection part 20. The reflecting unit 20 is fixed to the base 40, for example.

[Frame body]
The frame body part 30 is a cylindrical frame body through which the light reflected by the reflection part 20 passes. The frame 30 includes a first opening 31 through which light from the reflection unit 20 enters and a second opening 32 through which light incident from the first opening 31 exits. The first opening 31 is an opening located at the end of the frame body 30 on the light source unit 10 side (the reflection unit 20 side). On the other hand, the second opening 32 is an opening located at the end of the frame body 30 on the ceiling 90 side (attached part side).

  The first opening portion 31 is formed so as to surround the second opening portion 22 of the reflecting portion 20, and the opening size of the first opening portion 31 is larger than the opening size of the second opening portion 22 of the reflecting portion 20. Is also big. Further, in the frame body portion 30, the size of the second opening portion 32 is larger than the size of the opening of the first opening portion 31.

  The inner surface shape of the frame body part 30 is formed so that the light incident from the reflection part 20 does not strike. That is, the inner surface of the frame body part 30 is not located on the optical path of the light emitted from the second opening 21 of the reflection part 20.

  In the present embodiment, the frame body portion 30 has a cylindrical shape with an inner surface having a truncated cone shape, and the inner diameter gradually increases from the first opening portion 31 toward the second opening portion 32. More specifically, the frame 30 has an outermost shape whose divergence angle substantially coincides with the divergence angle α of the light emitted from the reflecting portion 20 and whose inner surface is the outermost of the light emitted from the reflecting portion 20. It is formed so as to be close to light. In other words, the light emitted from the reflecting portion 20 is prevented from hitting the inner surface of the frame body portion 30, and the distance between the outermost light from the reflecting portion 20 and the inner surface of the frame portion 30 in the frame body portion 30 is, for example, It is about 2-3 mm. The inner surface of the frame part 30 may be either a flat surface or a curved surface.

  In addition, the fact that the light incident from the reflecting portion 20 does not hit the inner surface of the frame body portion 30 is due to the design of the frame body portion 30 (the aim of the design). There is light that inevitably arrives. For example, when the light emitted from the light source unit 10 is reflected by the inner surface of the reflecting unit 20, the light diffuses (scatters) on the inner surface of the reflecting unit 20, so that the diffused light may reach the inner surface of the frame body unit 30. is there.

The inner surface of the frame 30 may be the same color and the same pattern as the ceiling 90. The geometric average luminance of the inner surface of the frame body 30 when the light source unit 10 emits light is preferably 40 [cd / m ² ] or less. Here, the geometric average luminance is an average value of luminance in the visual field obtained by geometric averaging.

  The frame body portion 30 is disposed between the instrument main body portion 2 and the ceiling 90 (attached portion). In the present embodiment, the frame body portion 30 is disposed between the reflection portion 20 and the ceiling 90. More specifically, the frame body portion 30 includes an opening surface of the second opening 22 of the reflecting portion 20 and a ceiling surface of the ceiling 90 so that the reflecting portion 20 and the ceiling 90 are positioned at a predetermined interval. It is interposed between.

  Further, the frame body portion 30 is held on the ceiling 90 by a flange portion 33 formed so as to protrude outward in the radial direction of the frame body portion 30. Specifically, when the lighting fixture 1 is disposed in the opening of the ceiling 90, the flange portion 33 is locked to the ceiling surface (attached surface) of the ceiling 90 to fix the lighting fixture 1 to the ceiling 90. Although not shown, a plurality of attachment springs made of a metal plate or the like for attaching the luminaire 1 to an attachment portion such as a ceiling are attached to the frame body portion 30, and the luminaire 1 is attached to the attachment spring. Is held in the opening of the ceiling 90.

  When the user looks up at the luminaire 1 installed on the ceiling 90, the user can see only the frame body part 30 when the elevation angle θ is within 30 ° of the frame body part 30 and the reflection part 20. Specifically, when the elevation angle θ is within 30 °, only the inner surface of the frame body portion 30 is visible, and other members are not visible. The elevation angle θ is an angle formed by the ceiling surface of the ceiling 90 and the user's line of sight. For example, the end portion (point C in FIG. 1) of the opening surface of the second opening portion 32 of the frame body portion 30 and the reflecting portion. 20 is an angle formed by a line connecting an end portion (point B in FIG. 1) of the opening surface of the second opening portion 22 and the ceiling surface of the ceiling 90.

  The frame body portion 30 is a white resin molded product made of a hard resin material such as PBT, for example, and the inner surface of the frame body portion 30 is a white surface without a pattern. In addition, the frame part 30 is not restricted to resin, The metal etc. which were comprised with metal materials, such as aluminum, may be sufficient. In the present embodiment, the frame part 30 is a thin plate-like frame in order to reduce noise.

[Base]
The base 40 is an attachment base to which the light source unit 10 is attached. The base 40 also functions as a heat sink that dissipates heat generated by the light source unit 10. Therefore, the base 40 may be formed of a metal material, and is made of, for example, aluminum die casting. In the present embodiment, the base 40 is a part of the instrument main body 2.

[Action]
In the lighting fixture 1 configured as described above, when the light source unit 10 emits light (lights up), light is emitted from the light source unit 10. The light from the light source unit 10 is emitted from the second opening 22 of the reflection unit 20 and is emitted to the outside through the internal space of the frame body unit 30.

  Specifically, the light emitted from the light source unit 10 enters the first opening 21 of the reflecting unit 20, exits from the second opening 22, and enters the frame body 30. At this time, a part of the light incident on the reflection part 20 is reflected by the inner surface of the reflection part 20 and enters the frame part 30 as reflected light. On the other hand, the other part of the light incident on the reflecting part 20 is incident on the frame part 30 as direct light from the light source part 10 without being reflected by the inner surface of the reflecting part 20. In the present embodiment, the light emitted from the light source unit 10 is light-distributed by the shape of the inner surface of the reflecting unit 20, and the light (direct light, reflected light) emitted from the second opening 22 of the reflecting unit 20 is spread. The angle α is determined by the inner shape of the reflecting portion 20.

  Further, the frame body part 30 is configured so that the light incident from the reflection part 20 does not hit the inner surface of the frame body part 30, and is on the optical path of the light emitted from the second opening 22 of the reflection part 20. The inner surface of the frame part 30 is not located. That is, the optical path of the direct light from the light source section 10 and the reflected light reflected by the inner surface of the reflection section 20 is located inside the frame body section 30, and the frame body section is on the optical path of these direct light and reflected light. The inner surface of 30 is not located. Specifically, the inner surface of the frame body portion 30 does not exist within the range of the spread angle α of the light emitted from the reflecting portion 20. Thereby, the light from the reflecting part 20 that has entered the frame body part 30 is emitted from the frame body part 30 to the outside of the luminaire 1 without being reflected by the inner surface of the frame body part 30.

  As a result, the inner surface of the frame body part 30 can be removed from the optical path of the direct light from the light source part 10 and the reflected light by the reflection part 20, so that the direct light and the reflected light are applied to the inner surface of the frame body part 30. The hitting can be substantially avoided.

  At this time, the instrument body parts such as the light source part 10 and the reflection part 20 can be positioned inside the ceiling 90 (attached part). For this reason, when the luminaire 1 is viewed from the room, only the frame 30 that is not exposed to light is mainly visible. Thereby, glare can be suppressed.

  And since it is not necessary to make the inner surface of the frame part 30 into a mirror surface, what exists in the circumference | surroundings of the lighting fixture 1 can be prevented from reflecting in a mirror surface. As a result, since the presence of the lighting fixture 1 can be suppressed, a natural space can be realized even if the lighting fixture 1 is installed.

  This point will be described with reference to FIGS. 2A and 2B. FIG. 2A is a schematic diagram showing a state when the lighting apparatus 100 of the comparative example is installed on the ceiling 90 in the room. FIG. 2B is a schematic diagram illustrating a state when the lighting fixture 1 according to the embodiment is installed on the ceiling 90 in the room.

  As shown in FIG. 2A, in the luminaire 100 using the frame body portion 130 whose inner surface is a mirror surface, the inner surface (mirror surface) of the frame body portion 130 is the one around the luminaire 100 (an object or wall placed in the space). Or the floor etc.), and the user feels that the lighting apparatus 100 exists. That is, the inner surface of the frame body portion 130 should be a mirror surface in order to suppress glare or suppress the presence on the ceiling 90, but the lighting device 100 can be made by making the inner surface of the frame body portion 130 a mirror surface. It turned out that the existence of was made noticeable.

  On the other hand, as shown in FIG. 2B, in the lighting fixture 1 according to the present embodiment, since the inner surface of the frame body portion 30 is not a mirror surface, surrounding objects can be prevented from being reflected on the inner surface of the frame body portion 30. Thereby, it can be made difficult to make a user feel that the lighting fixture 1 exists. Thereby, since presence of the lighting fixture 1 can be suppressed in both cases of lighting and extinguishing of the lighting fixture 1, a natural indoor space can be realized.

  As shown in FIG. 1, the light distribution angle of the luminaire 1 includes the opening diameter (φ) of the frame body part 30, the distance (L) from the light source part 10 to the ceiling surface of the ceiling 90, and the reflection part 20. It can be adjusted by appropriately setting the shape of the reflecting surface (the spread angle α of the light emitted from the reflecting portion 20). The opening diameter (φ) of the frame body portion 30 is, for example, 100 mm.

[Summary]
As described above, according to the lighting fixture 1 in the present embodiment, when the light from the light source unit 10 is emitted from the second opening 22 of the reflection unit 20 and is emitted to the outside through the internal space of the frame body unit 30, The inner surface of the frame body part 30 is not located on the optical path of the light emitted from the second opening part 22 of the reflection part 20.

  Thereby, it is possible to substantially avoid the light from the light source unit 10 emitted from the reflection unit 20 from hitting the inner surface of the frame body portion 30, and what is present around the luminaire 1 is reflected on the inner surface of the frame body portion 30. This can be avoided. Therefore, it is possible to realize a lighting fixture that can realize a natural space by suppressing the presence on the ceiling 90 while preventing glare.

  Moreover, in this Embodiment, the inner surface of the frame part 30 is the same color as the ceiling 90 which is a to-be-attached part. In addition, when there is a pattern on the ceiling 90, the inner surface of the frame 30 can be the same color and the same pattern as the ceiling 90.

  Thereby, the inner surface of the frame part 30 is made to become familiar with a to-be-attached part (ceiling 90), and the lighting fixture 1 can be assimilated to the to-be-attached part. Therefore, the presence of the luminaire 1 can be further suppressed, and a more natural space can be realized.

  Further, in the present embodiment, of the frame body part 30 and the reflection part 20, only the frame body part 30 is visible when the elevation angle θ is within 30 °.

  Thereby, while being able to prevent glare reliably, the presence of the lighting fixture 1 can be suppressed further and a more natural space can be implement | achieved.

Moreover, in this Embodiment, the geometric average brightness | luminance of the inner surface of the frame part 30 when the light source part 10 light-emits is 40 [cd / m < ² >] or less.

As described above, when the light emitted from the light source unit 10 is reflected by the inner surface of the reflecting unit 20, the diffused light may inevitably strike the inner surface of the frame body unit 30 due to light diffusion (scattering). For this reason, even if the inner surface of the frame body part 30 is not present on the optical path of the light emitted from the reflection part 20, the light may be reflected by the inner surface of the frame body part 30. That is, the inner surface of the frame 30 may shine due to reflection. However, the glare can be controlled by setting the geometric average luminance of the inner surface of the frame 30 to 40 [cd / m ² ] or less. Thereby, glare can be prevented more reliably.

(Modifications, etc.)
As mentioned above, although the lighting fixture which concerns on this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment.

  For example, in the above-described embodiment, the frame 30 has light whose inner surface emits from the reflector 20 so that the spread angle of the inner surface shape substantially coincides with the spread angle α of light emitted from the reflector 20. However, the shape of the frame body portion 30 is not limited to this. As an example, as in the frame portion 30A shown in FIG. 3, the spread angle of the inner surface shape is different from the spread angle α of the light emitted from the reflection unit 20 and the inner surface of the light emitted from the reflection unit 20 It may be formed so as not to be close to the outermost light.

  Moreover, in the said embodiment, you may arrange | position the light distribution control member for controlling the light distribution of the light radiate | emitted from the light source part 10 in the position of the light emission side of the light source part 10. FIG. In this case, the light emitted from the reflection unit 20 may be controlled by the light distribution control member and the reflection unit 20. For example, as shown in FIG. 4, the lens 50 can be disposed on the light emission side of the light source unit 10 as such a light distribution control member. The lens 50 is, for example, a convex lens. The light distribution control member is not limited to the lens 50, and may be another optical member such as a reflector. Further, the position of the lens 50 may not be inside the reflecting portion 20.

  Moreover, in the said embodiment, you may arrange | position a translucent member in the position of the light emission side of the light source part 10. FIG. For example, as shown in FIG. 5, a translucent panel 60 can be provided as a translucent member in the vicinity of the second opening 22 of the reflecting unit 20. The light source unit 10 can be protected by providing the translucent panel 60. Note that the position of the translucent panel 60 is not limited to the vicinity of the second opening 22 of the reflection unit 20, and may be disposed in the vicinity of the second opening 32 of the frame body 30 or in the vicinity of the light source unit 10. Good. Moreover, as long as the light from the reflection part 20 does not hit the inner surface of the frame part 30, the translucent member may have not only translucency but light diffusivity. For example, a transmissive member (a diffusion panel or a diffusion sheet) having diffusibility may be disposed between the light source unit 10 and the reflection unit 20.

  Moreover, in the said embodiment, although the light source part 10 was comprised so that white light might be emitted by blue LED and yellow fluorescent substance, it is not restricted to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used so that white light is emitted by combining this with a blue LED.

  Moreover, in the said embodiment, although blue LED was used as LED, it is not restricted to this. For example, as the LED, an LED that emits a color other than blue may be used. In this case, the phosphor may be appropriately selected according to the LED.

  Moreover, in the said embodiment, although the light source part 10 (LED light source) was set as the COB structure which mounted the LED chip directly on the board | substrate, it is not restricted to this. For example, an LED module having an SMD (Surface Mount Device) structure may be used in place of the LED module having a COB structure. An LED module having an SMD structure is a package type LED element in which an LED chip (light emitting element) is mounted in a recess of a resin package (container) and a sealing member (phosphor-containing resin) is enclosed in the recess. One or a plurality of (SMD type LED elements) is mounted on a substrate.

  In the above embodiment, the LED is exemplified as the light emitting element. However, as the light emitting element, a semiconductor light emitting element such as a semiconductor laser or other solid light emitting element such as an organic EL (Electro Luminescence) or an inorganic EL is used. May be.

  Moreover, the lighting fixture 1 in the said embodiment may be installed in other to-be-attached parts (attached body), such as construction materials other than the ceiling 90. FIG. Moreover, this invention is applicable also to lighting fixtures other than a downlight.

  In addition, the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Appliance main-body part 10 Light source part 20 Reflection part 21,31 1st opening part 22,32 2nd opening part 30,30A Frame part 33 Flange part 40 Base 50 Lens 60 Translucent panel 90 Ceiling (attachment) Part)

Claims (4)

It is a lighting fixture installed in a to-be-attached part,
An instrument body having a light source and a reflective part having an opening;
A frame body portion disposed between the instrument main body portion and the attached portion;
The light from the light source part is emitted from the opening part of the reflection part and emitted to the outside through the internal space of the frame body part,
The lighting fixture in which the inner surface of the said frame part is not located on the optical path of the light radiate | emitted from the said opening part of the said reflection part. The frame part is a cylinder,
The lighting fixture according to claim 1, wherein an inner surface of the frame body portion has the same color and the same pattern as the attached portion. The lighting fixture according to claim 1 or 2, wherein, of the frame body part and the reflection part, only the frame body part is visible when an elevation angle θ is within 30 °. The lighting fixture according to any one of claims 1 to 3, wherein a geometric average luminance of an inner surface of the frame body when the light source emits light is 40 [cd / m ² ] or less.

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