Luminaire including a radio frequency transceiver spaced from a light engine - Patents.com
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SIGNIFY HOLDING BV
- Filing Date
- 2023-04-05
- Publication Date
- 2026-04-13
AI Technical Summary
Existing outdoor lighting fixtures with integrated communication capabilities face challenges in thermal management and maintenance, which affect their performance and reliability.
The outdoor lighting fixture design includes a light engine with a heat sink, a radio frequency transceiver with a separate heat sink, and a support structure that maintains a spaced distance between the transceiver and the light engine to enhance airflow and cooling. This design also features a hinged canopy for easy access and maintenance.
The solution improves thermal management by ensuring effective airflow and cooling, while also facilitating easier maintenance and enhancing the communication capabilities of outdoor lighting fixtures.
Smart Images

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Abstract
Description
[Technical field]
[0001] The present invention relates to an outdoor luminaire including a light engine and a radio frequency transceiver, the radio frequency transceiver being carried by a support structure at a location spaced from the light engine. [Background technology]
[0002] Recent developments are turning existing outdoor luminaires into a connectivity grid. Known solutions are increasing network density in and around cities by turning existing outdoor luminaires into a connectivity grid. These outdoor luminaires are pole mounted and used for street and roadway lighting, etc. This design has been around for decades, but has recently been updated with antennas and radio frequency transceivers for connectivity. It is desirable to improve the performance of these luminaires in terms of communication capabilities, e.g., via internet connectivity, and improved thermal management and / or maintenance.
[0003] WO2014141312A1 discloses a street-type LED luminaire integrated with a telecommunications device.
[0004] US20180045388A1 discloses a street lighting retrofit for providing access to wireless and cellular networks.
[0005] CN208687548U discloses a kind of street lamp type antenna. Summary of the Invention [Problem to be solved by the invention]
[0006] It is an object of the present invention to provide an outdoor luminaire suitable for communication, in which at least one of the disadvantages of known outdoor luminaires suitable for communication is overcome. To that end, an outdoor luminaire suitable for communication is provided according to the attached claims. [Means for solving the problem]
[0007] In a first aspect of the present invention, an outdoor lighting fixture includes: a canopy overlying the luminaire frame and having a canopy enclosure; an optical chamber bounded by the luminaire frame and the light exit window, the optical chamber at least partially housing the light engine; a light engine arranged below the canopy and including an LED light source configured to generate LED light, the light engine including a first heat sink in (direct) thermal contact with the LED light source (and optionally a driver which may be housed somewhere inside the luminaire, e.g. in the optical chamber and / or the canopy enclosure), wherein (in operation) the LED light is emitted as luminaire light from a light exit window; a luminaire axis extending through the center of the canopy and the midpoint of the optical chamber (typically, in an outdoor luminaire installation configuration, the direction from the center toward the midpoint is along the direction of gravity, in this respect meaning that along can deviate from the exact vertical direction of gravity by 10 degrees); an antenna system including one or more antennas for transmitting and / or receiving wireless signals, the antenna system being at least partially disposed within the outdoor lighting fixture (i.e., at least partially disposed in the canopy enclosure and / or optical chamber and may partially protrude from the lighting fixture); a radio frequency transceiver including radio frequency transceiver electronics and a second heat sink in (direct) thermal contact with the radio frequency transceiver, the radio frequency transceiver being communicatively coupled to an antenna system and configured to control transmission of wireless signals transmitted by the antenna system and / or process received wireless signals received by the antenna system; a support for supporting a radio frequency transceiver; Including, A support is attached to the luminaire frame and a radio frequency transceiver is attached to the support, the radio frequency transceiver being at least partially recessed (preferably completely recessed) in the canopy enclosure and positioned at a distance S from the first heat sink.
[0008] Typically, the outdoor luminaire is a street lighting fixture. The primary architecture of an outdoor luminaire is a pole with a "lantern" based design, with an LED light engine located at the top of the lantern above a typically four-sided inverted cone / pyramid shaped exit window, providing light in a downward direction to illuminate the road and / or walkway surrounding the pole. Other convenient shapes of the exit window are circular, elliptical, and hexagonal. The light engine includes an LED light source, typically an LED array, and optics, typically a lens array, for redirecting at least a portion of the LED light emitted by the LED light source. A heat sink, typically with fins on the back side, cools the LED light source. A radio frequency transceiver, also referred to herein as a radio unit, also includes a heat sink, as it provides a significant amount of heat. The term "radio frequency transceiver" can be equally replaced by the terms "wireless module", "radio module" or "combination of transmitter and receiver". The radio unit is covered by a canopy / cover, typically shaped as an inverted cone or pyramid. Preferably, the centre of the radio frequency transceiver is mounted in the canopy recess in the range of 0.3*H to 0.7*H, preferably in the centre of the recess, where H is the height of the canopy recess in the direction of gravity. In an embodiment, H may be at least 20 cm.
[0009] To improve thermal management, the radio unit is raised and spaced from the (heat fins of) the light engine by an open, air spacing with a spacing height S, preferably S is at least 1 cm, preferably at least 2 cm, more preferably at least 3 cm, to have enough space for good airflow and cooling. However, the spacing is preferably at most 10 cm, more preferably at most 8 cm, most preferably at most 6 cm, to avoid the luminaire becoming too wide. For this spacing, typically a legged radio unit support can be used. The support includes a support base, with support legs typically arranged at an angle α to the support base and the radio unit in the lifted position, typically in the range of 10°≦α≦80°, but α may be 90° if α is different from 90°. The support is attached to the (inner surface of) the lantern, typically includes four legs, with a support base above the light engine. In this way, an open structure is obtained so that cooling of the LED engine is guaranteed. In other words, openings are made between the legs to enhance the airflow inside the luminaire, in order to further improve the heat dissipation properties of the outdoor luminaire. Alternatively, the number of support legs may be, for example, 2, 3 or 6, and may be related to or, for example, equal to, the number of antennas.
[0010] For further improved mechanical integrity, the support may have an inner skeleton, e.g., a ring-shaped part (e.g., folded or welded metal part(s)), which is coupled to the luminaire frame. The openings between the legs are typically in the range of 20% to 80% of the total area of the virtual wall of the inner frame formed by the legs to enhance cooling via convection airflow but also provide mechanical stability. Through holes may be made in the legs to increase the opening area and increase the amount of free convection airflow. If the openings occupy less than 20% of the total area of the virtual wall of the inner frame, the free convection airflow may be too low for the desired amount of cooling. However, if the openings exceed 80% of the total area of the virtual wall of the inner frame, the mechanical integrity of the support unit may be lower than desired.
[0011] The legs may include perforations between the legs and the support base to facilitate bending between the legs and the support base, which is particularly desirable when the support unit is a monolithic part, e.g. a metal plate, in which both the support base and the support legs are integrally formed. The support unit is preferably in thermal contact with the canopy, which is typically a molded metal plate such as aluminum, to contribute to cooling of the LED light source and the radio unit. One or more antennas, e.g. four (or more) antennas, may be attached to the support, e.g. the inner skeleton. All antennas have their respective line of sight in a substantially horizontal plane, i.e. may deviate from the exact horizontal plane by no more than 10 degrees. The direction of the line of sight of the antennas is preferably uniform in the (substantially) horizontal plane to allow 360 degree connectivity in the horizontal plane, and therefore are arranged in a specific manner around the horizontal periphery of the frame. Preferably, the antennas together cover at least 300 degrees, e.g. 360 degrees, but the antennas together could cover at least 180 degrees, e.g. two antennas each covering 120-140 degrees, or three antennas together covering 270 degrees.
[0012] The radio unit is at least partially, preferably completely, housed in a recess in the canopy. The canopy is preferably hinged to the top of the luminaire frame to facilitate maintenance of the radio unit and / or the light engine. This maximises the potential of the canopy space. Furthermore, the canopy may be metallic and in (direct) thermal contact with the first and / or second heat sink, preferably via the support.
[0013] Thus, as already made clear above, the outdoor lighting fixture may have several different features and / or combinations of features, as specifically set forth below.
[0014] The outdoor lighting fixture may be characterized by the following spacing S: 1 cm≦Spacing S.
[0015] The outdoor lighting fixture may be characterized in that the support includes a support base and a plurality of support legs connecting the support base and the lighting fixture frame, and the radio frequency transceiver is disposed on the support base to elevate the radio frequency transceiver from the first heat sink at the spacing S.
[0016] The outdoor lighting fixture may have a feature in which an opening is formed between the plurality of support legs and the lighting fixture frame to allow circulation of airflow along the radio frequency transceiver and the first heat sink.
[0017] The outdoor lighting fixture may have the feature that the support legs include through holes to further allow for circulation of airflow along the radio frequency transceiver and the first heat sink.
[0018] The outdoor lighting fixture may be characterized in that the number of support legs is at least three, preferably four.
[0019] The outdoor lighting fixture may be characterized in that the support leg forms an angle α with the support base, 10°≦α≦80°, preferably 30°≦α≦60°.
[0020] The outdoor luminaire may have the feature that the support legs are fixed on an inner skeleton, which is fixed to the luminaire frame, i.e. to the inner surface of the luminaire frame.
[0021] The outdoor lighting fixture may be characterized in that the inner skeleton is ring-shaped.
[0022] The outdoor lighting fixture may have the further feature that the inner skeleton supports one or more antennas.
[0023] The outdoor lighting fixture may have the feature that the antenna is mounted to a support base.
[0024] The outdoor lighting fixture may have the feature that perforations are provided at the interface between the support base and the support legs to facilitate shaping of the support.
[0025] The outdoor lighting fixture may be characterized in that the openings and / or through holes between the support legs occupy an area between 20 and 80% of the area of the imaginary wall formed by the support legs.
[0026] The outdoor lighting fixture may be characterized in that the canopy is made of metal and is in thermal contact with the first heat sink and / or the second heat sink, preferably via said support.
[0027] The outdoor luminaire may have the feature that a canopy is hinged to the luminaire frame, allowing the luminaire to be opened for easy access to the radio frequency transceiver, facilitating replacement of the light source / engine and / or servicing / maintenance of the outdoor luminaire.
[0028] The outdoor lighting fixture may have the feature that the LED light source may include a plurality of LEDs. In particular, the LEDs may be arranged in an array including N LEDs in a row and M LEDs in a column. Preferably, N may be at least 2 and M may be at least 2. The light source may be a COB (Chip on Board) with peanut optics or a reflector.
[0029] The outdoor lighting fixture may have the feature that the LED light may be white light. In particular, the white light may have a correlated color temperature in the range of 2000-6000K and / or a color rendering index of at least 70, preferably at least 80.
[0030] The outdoor luminaire may have the feature that the light-exit window comprises a window panel which may be translucent, in particular transparent. In a preferred configuration, the light-exit window may comprise a plurality of light outlets (plates), for example four light outlets (plates), although it is also possible that the window pane is a single circumferential panel. It is also possible that the light-exit window does not comprise a window panel.
[0031] The outdoor lighting fixture may have the feature that the optical chamber may be a light mixing chamber configured to mix the LED light.
[0032] The outdoor lighting fixture may be characterized in that the first heat sink and / or the second heat sink include a plurality of fins.
[0033] The outdoor lighting fixture may be characterized in that the support leg may have a support leg length Ll, where Ll may be at least 2 cm, preferably at least 3 cm, more preferably at least 4 cm, and most preferably at least 5 cm.
[0034] The outdoor lighting fixture may have a support base having a support base area Asb, Asb being at least 25 cm 2 , preferably at least 40 cm 2 , more preferably at least 50 cm 2 , most preferably at least 60 cm 2 The present invention may have the following characteristics:
[0035] The outdoor lighting fixture may have the feature that the support legs may be provided with through holes, for example each support leg may include one or more through holes. In particular, the through holes may have a diameter / width of at least 1 cm.
[0036] The outdoor lighting fixture may be characterized in that the interface between the support base and (each of) the support legs may be provided with one or more (e.g., at least five) perforations, which may have a diameter / width of less than 4 mm. [Brief description of the drawings]
[0037] The invention will now be further explained by means of schematic drawings, which may not be to scale and may have some parts enlarged for illustrative purposes, which are in no way intended to limit the scope of the invention, but rather to illustrate its full potential. [Figure 1A] 1 shows a side view of a first embodiment of an outdoor lighting fixture according to the present invention in a closed configuration. [Figure 1B] FIG. 1B illustrates a perspective view of the outdoor lighting fixture of FIG. 1A in an open configuration. [Figure 1C] FIG. 1B illustrates a perspective view of the outdoor lighting fixture of FIG. 1A in a partially exploded configuration. [Figure 1D] 1B shows a support on which the antenna and radio frequency transceiver of the outdoor lighting fixture of FIG. 1A are mounted. [Figure 2A] 2 shows a side view of a second embodiment of an outdoor lighting fixture according to the present invention. [Figure 2B] FIG. 2B illustrates a side view of the outdoor lighting fixture of FIG. 2A in an open configuration. [Figure 3A] 1 shows a perspective view of a third embodiment of an outdoor lighting fixture according to the present invention. [Figure 3B] 3B shows a support on which the antenna and radio frequency transceiver of the outdoor lighting fixture of FIG. 3A are mounted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0038] 1A shows a side view of the basic structure of a first embodiment of an outdoor lighting fixture 1000 according to the present invention in a closed configuration. The outdoor lighting fixture 1000 includes a canopy 100 resting on a lighting fixture frame 200 and having a canopy enclosure 110. The lighting fixture frame 200, together with a light exit window 210 and a bottom wall 220, encloses an optical chamber 230. A lighting fixture axis 1010 extends through a center 120 of the canopy 100 and a midpoint 240 of the optical chamber 230. When the lighting fixture is in a mounted configuration, i.e., installed, the lighting fixture axis 1010 extends vertically in the direction of gravity, and the direction from the center 120 of the canopy 100 towards the midpoint 240 of the optical chamber 230 is a downward direction.
[0039] FIG 1B shows a perspective view of the basic structure of the outdoor lighting fixture 1000 of FIG 1A in an opened configuration. The canopy 100 is hinged to the lighting fixture frame 200 via hinge 130. The radio frequency transceiver 300 is mounted to a support base 320 of a support 310 and disposed in the canopy enclosure 110. The support base 320 is coupled to the lighting fixture frame 200 via four support legs 330 such that the radio frequency transceiver 300 is spaced apart by a distance S (not shown) from a first heat sink 410 of a light engine 400, said light engine 400 being disposed in an optical chamber 230 below the canopy 100. There are openings 340 between the four support legs 330 and the luminaire frame 200, and the support legs 330 are provided with through holes 350 to allow free (convection) airflow through said space S between the radio frequency transceiver 300 and the first heat sink 410 of the light engine 400. The four antennas 510 (only two are visible in the figure) of the antenna system 500 are mounted in a partly recessed manner on the luminaire frame 200, the antennas 510 pointing in four different directions in the horizontal plane P, similar to the four cardinal directions of a compass, i.e., north, east, south and west. In other words, two pairs of antennas 510 are arranged at a mutual angle of 90 degrees in the horizontal plane P, with the antennas 510 of each pair pointing in opposite directions (i.e., at a mutual angle of 180 degrees). The radio frequency transceiver 300 is communicatively coupled to the antenna system 500 and configured to control the transmission of wireless signals transmitted by the antenna system 500 and / or process received wireless signals received by the antenna system 500.
[0040] 1C shows a perspective view of the outdoor luminaire 1000 of FIG. 1A in a partially disassembled configuration, i.e., with the radio frequency transceiver removed and the first heat sink 410 of the light engine 400 clearly exposed / visible. The first heat sink 410 may extend partially from the optical chamber 230 into the canopy enclosure 110 of the canopy 100. The first heat sink 410 is attached to the metal luminaire frame 200 of the outdoor luminaire 1000 such that heat generated by a light source (not shown) of the light engine 400 can be dissipated from the first heat sink 410 to the luminaire frame 200 via thermal conduction and then from the luminaire frame 200 to the environment.
[0041] FIG. 1D shows the support 310 on which the antenna 510 and radio frequency transceiver 300 of the antenna system 500 are mounted, separated from the outdoor luminaire of FIG. 1A. As shown, the radio frequency transceiver 300 is mounted on the support base 320, which is fixed to the luminaire frame 200 via four support legs 330 and an inner, ring-shaped skeleton 250. The support base 320 and the support legs 330 are monolithic parts, i.e. made integrally from a single metal plate. The interface 360 between the support base 320 and the support legs 330 is provided with perforations 370 to facilitate the shaping of the support 310. Here, the support legs 330 are arranged at an angle α of about 45 degrees with the (plane of) the support base 320. The inner skeleton 250 is made of a good thermally conductive metal, such as aluminum, copper or zinc-coated iron. Four antennas 510 are attached to and supported by the inner skeleton 250. Openings 340 exist between the support legs 330 and the inner skeleton 250, and through-holes 350 exist in both the support legs 330 and the support base 320. The openings 340 between the support legs 330 occupy approximately 50% of the area of the imaginary wall 380 (shown by the dotted lines) formed by the support legs 330.
[0042] 2A shows a side view of a second embodiment of an outdoor luminaire 1000 according to the present invention. The outdoor luminaire 1000 is a street light and includes a pole 1020 on which a canopy 100 is mounted, said canopy 100 having a canopy enclosure 110. The luminaire frame 200, together with a light exit window 210 and a bottom wall 220, encloses an optical chamber 230. A luminaire axis 1010 extends through the center 120 of the canopy 100 and the midpoint 240 of the optical chamber 230. When the luminaire is in the mounted configuration, i.e. installed, the luminaire axis 1010 extends in the vertical direction of gravity, and the direction from the center 120 of the canopy 100 towards the midpoint 240 of the optical chamber 230 is a downward direction. Antennas 510 (only one shown) of the antenna system 500 are supported by the luminaire frame 200. The light engine 400 is disposed below the canopy 100 and includes a LED light source 420 configured to generate LED light 430, and includes a first heat sink (not shown) in (direct) thermal contact with said LED light source 420, which is emitted as luminaire light 440 from a light exit window 210. The optical chamber 230 at least partially houses the light engine 400, i.e. here houses at least the light source 420. The canopy 100 is hinged to the luminaire frame 200 by a hinge 130. The canopy enclosure 110 has a height H and houses a radio frequency transceiver 300 (shown by a ghost line), said radio frequency transceiver being disposed at / close to the center 120 of the canopy at a vertical position Hv of approximately 0.45*H.
[0043] FIG. 2B shows a side view of the outdoor luminaire of FIG. 2A in an open configuration mounted on a pole 1020. The canopy 100 is hinged to the luminaire frame 200 via a hinge 130. The radio frequency transceiver 300 is mounted on a support base 320 of a support 310 and disposed in the canopy enclosure 110. The support base 320 is coupled to the luminaire frame 200 via two support legs 330 such that the radio frequency transceiver 300 is spaced apart from a first heat sink 410 of the light engine 400 by a distance S (in the figure, S is about 4 cm). The light engine 400 is disposed below the canopy 100 such that (when the street light luminaire is closed) its light source 420 is in the optical chamber 230 and its first heat sink 410 is in the canopy enclosure 110. The radio frequency transceiver 300 includes radio frequency transceiver electronics 390 and a second heat sink 395 in (direct) thermal contact with the radio frequency transceiver electronics 390 .
[0044] 3A shows a perspective side view of a third embodiment of an outdoor luminaire 1000 according to the present invention with the canopy removed. The radio frequency transceiver 300 is mounted on a support base 320 of a support 310 for placement in a canopy enclosure. The support base 320 is coupled to the luminaire frame 200 via four support legs 330 such that the radio frequency transceiver 300 is spaced apart by a distance S (not shown) from a first heat sink 410 of a light engine 400, said light engine 400 being placed in an optical chamber 230. There are openings 340 between the four support legs 330 and the luminaire frame 200, and the support legs 330 are provided with through holes 350 to allow free (convection) airflow through said distance S between the radio frequency transceiver 300 and the first heat sink 410 of the light engine 400. The antennas 510 (four in number) of the antenna system 500 are mounted on the carrier 333 of the support 310 (see FIG. 3B for details) and are accommodated in the slots 260 of the luminaire frame 200 in such a manner that the radio frequency transceiver 300 together with the support 310 and the antennas 510 are at least partially accommodated when the radio frequency transceiver 300 is installed on the luminaire frame 200 over the light engine 400. The antennas 510 face in four different directions in the horizontal plane P, similar to the four cardinal directions of a compass, i.e., north, east, south and west. In other words, two pairs of antennas 510 are arranged at a mutual angle of 90 degrees in the horizontal plane P, with the antennas 510 of each pair facing in opposite directions (i.e., at a mutual angle of 180 degrees). The radio frequency transceiver 300 is communicatively coupled to the antenna system 500 and configured to control the transmission of wireless signals transmitted by the antenna system 500 and / or process received wireless signals received by the antenna system 500.
[0045] FIG. 3B shows the support 310 with the antenna 510 and the radio frequency transceiver 300 mounted thereon, separated from the outdoor luminaire of FIG. 3A. As shown, the radio frequency transceiver 300 is mounted on the support base 320, which is adapted to be fixed to the luminaire frame via an internal, ring-shaped skeleton (see FIG. 3A) via four support legs 330. The support base 320 and the support legs 330 are monolithic parts, i.e. made integrally from a single metal plate. The four antennas 510 are mounted on the support 310 and are supported by the support 310. Openings 340 are present between the support legs 330 and through-holes 350 are present in the support legs 330. To create the through-holes 350, cuts are made in the support legs 330, making it possible to fold a part of the support legs and form a folded, cut-out part that serves as a carrier 333 for each antenna 510 associated with each support leg 330. Alternatively or additionally, at least one driver 600 may be disposed and carried by at least one of the support legs 330 .
Claims
1. It sits atop the lighting fixture frame and has a canopy enclosure, An optical chamber surrounded by the aforementioned lighting fixture frame and light outlet window, the optical chamber comprising at least partially housing a light engine, A light engine comprising an LED light source positioned below the canopy and configured to generate LED light, and a first heat sink in thermal contact with the LED light source, wherein the LED light is emitted as illuminating light from the light outlet window, An illumination axis extending through the center of the canopy and the midpoint of the optical chamber, An antenna system comprising one or more antennas for transmitting and / or receiving wireless signals, wherein the antenna system is at least partially located within an outdoor lighting fixture. A radio frequency transceiver comprising radio frequency transceiver electronics and a second heat sink in thermal contact with the radio frequency transceiver electronics, wherein the radio frequency transceiver is commutably coupled to an antenna system and configured to control the transmission of wireless signals transmitted by the antenna system and / or process received wireless signals received by the antenna system, A support for supporting the aforementioned radio frequency transceiver, Outdoor lighting fixtures including, An outdoor lighting fixture in which the support is attached to the lighting fixture frame, the radio frequency transceiver is attached to the support, the radio frequency transceiver is at least partially housed in the canopy enclosure and positioned at a distance S from the first heat sink.
2. An outdoor lighting fixture according to claim 1, wherein the interval S is 1 cm or less.
3. The outdoor lighting fixture according to claim 1 or 2, wherein the support body includes a support base and a plurality of support legs connecting the support base and the lighting fixture frame, and the radio frequency transceiver is disposed on the support base.
4. The outdoor lighting fixture according to claim 3, wherein an opening is formed between the plurality of support legs and the lighting fixture frame.
5. The outdoor lighting fixture according to claim 3, wherein the support legs are provided with through holes.
6. The outdoor lighting fixture according to claim 3, wherein the number of support legs is at least 3, preferably 4.
7. The outdoor lighting fixture according to claim 3, wherein the support legs are positioned / formed at an angle α with respect to the support base, and the angle is 10° ≤ α ≤ 80°, preferably 30° ≤ α ≤ 60°.
8. The outdoor lighting fixture according to claim 3, wherein the support legs are fixed on an inner skeleton, and the inner skeleton is fixed to the lighting fixture frame.
9. The outdoor lighting fixture according to claim 8, wherein the inner skeleton is ring-shaped.
10. The outdoor lighting fixture according to claim 8, wherein the inner skeleton supports one or more antennas, preferably four antennas arranged in different directions.
11. The outdoor lighting fixture according to claim 1 or 2, wherein the antenna is attached to the support body.
12. The outdoor lighting fixture according to claim 3, wherein one or more holes are provided at the interface between the support base and the support leg.
13. The outdoor lighting fixture according to claim 4, wherein the opening between the support leg and the lighting fixture frame occupies an area between 20% and 80% of the area of the virtual wall formed by the support leg.
14. The outdoor lighting fixture according to claim 1 or 2, wherein the canopy is made of metal and is in thermal contact with the first heat sink and / or the second heat sink, preferably via the support.
15. The outdoor lighting fixture according to claim 1 or 2, wherein the canopy is hinged to the lighting fixture frame, allowing the lighting fixture to be opened for easy access to the radio frequency transceiver.