Patent Publication Number: US-2022228736-A1

Title: In grade light fixture and subassemblies thereof

Description:
FIELD OF THE INVENTION 
     The present disclosure is generally directed to in grade (in-ground) light fixtures and recessed luminaires and subassemblies thereof. 
     BACKGROUND 
     Known in grade light fixtures and recessed luminaires, which are usually flush with the surrounding ground level, have a number of disadvantages and drawbacks. For example, in grade light fixtures often have tilt mechanisms, however, these mechanisms are typically located on center. This forces the LED board to be further away from the lens to create room for the tilting LED board. Also, because in grade lighting fixtures are installed in the ground, these fixtures can be driven over with vehicles, which puts a great amount of force onto the lens of the fixture. The force is then transferred to the gasket in most designs. This high force can damage gaskets and cause water ingress failures through repetitive loading. 
     Further, in-grade lighting fixtures typically require a multi-stage installation sequence, including installing an outer box with a conduit to house the light fixture and power the light fixture, backfilling around the outer box with gravel, dirt, or concrete, and installing the light fixture inside of the outer box. For this reason, many in-grade light fixtures are sold with a temporary removable installation cover. The purpose of this cover is to cover the top opening of the outer box so that during the backfill step it is not filled in with dirt. Often times the cables originating from the conduit are left unconnected inside the outer box for periods of time before the light fixture is installed into the outer box. During this time, a temporary installation cover may be used to cap the top of the outer box to prevent dirt, water, or other objects including people from entering the open hole. However, ground water, dirt, insects, etc. can still contaminate the open ends of the cable connectors if they are left unconnected inside the outer box during this time. This can lead to water ingress issues and corrosion over time and cause failures. 
     Additionally, in grade light fixtures are exposed to high levels of moisture when they are installed in ground. This moisture, as well as trapped air around the fixture, prevents the use of traditional condensation mitigation strategies, such as venting. Venting is used with LED lights to equalize the pressure and humidity between the inside of the enclosure and the outside environment. Typically, condensation events do not occur or last very long in above grade lights with vents installed. However, in grade fixtures with vents have moisture accumulate inside the enclosure when vents are used. The vents allow the moisture to enter in the form of water vapor (humidity). Because of their in grade application, this moisture tends to remain in the enclosure instead of going out over time. There are other ways to prevent condensation such as sealing the enclosure (without vents), using a desiccant to adsorb the internal moisture, using an internal heater to keep the inside of the enclosure above the dew point which have drawbacks. Without a vent, pressure cannot equalize between the inside and outside, which puts stress on the seals. Desiccants can only adsorb so much moisture before they become saturated. Using heaters by themselves to reduce humidity becomes ineffective when the product has hit its thermal limit and the dew point is below the thermal limit of the product. 
     SUMMARY OF THE INVENTION 
     There is a continued need for improvements to in grade light fixtures and recessed luminaires. The present disclosure is directed to inventive in-grade light fixtures and recessed luminaires and subassemblies thereof, and more specifically, but not exclusively, to in grade light fixtures including a heat sink and pivot for a light subassembly of the light fixture, a gasket for the cover of the light fixture, and an installation cover for an outer box for installation of the light fixture. The recessed luminaire comprises a heat sink in contact with a light subassembly and a pivot on a side of the heat sink which provides a conduction path through the housing of the luminaire. The gasket has a plurality of components which allow the cover of the in grade light fixture to receive force without breaking the seal between the cover and the housing of the recessed luminaire. An outer box used during installation of the recessed luminaire has an installation cover having connectors for electric cable for installing the recessed luminaire. The connectors secure and protect the cable. 
     Generally, in one aspect, a recessed luminaire is provided. The recessed luminaire comprises: a housing having an internal surface; and a light subassembly having a first end and a second end, wherein the first end is pivotally secured to a pivot arranged on, in, or proximate to the internal surface of the housing. 
     In an aspect, the recessed luminaire further comprises a thermally conductive body engaged with the light subassembly, the thermally conductive body having a first end and a second end, wherein the thermally conductive body is in thermal contact with the internal surface of the housing. 
     In an aspect, the recessed luminaire further comprises a cover of the housing, wherein the pivot is located at a first distance away from the cover of the housing, wherein the light subassembly engaged with a thermally conductive body rotates a first rotational amount in a first rotational direction with respect to a first imaginary horizontal plane through the pivot and substantially parallel with the cover of the housing and a second rotational amount in a second rotational direction with respect to the first imaginary horizontal plane. 
     In an aspect, the recessed luminaire further comprises a gear plate non-rotatably secured to at least a portion of the thermally conductive body, the gear plate comprising a first set of gear teeth. 
     In an aspect, the recessed luminaire further comprises a lever comprising a first lever portion and a second lever portion non-rotatably connected, the first lever portion and the second lever portion arranged to pivot about a lever pivot point, wherein the second lever portion has a second set of gear teeth, wherein at least a portion of the second set of gear teeth are arranged to engage with at least a portion of the first set of gear teeth. 
     In an aspect, a first end of the first lever portion extends outside the housing of the recessed luminaire and is arranged to move within a channel of a securement plate from a first end of the channel to a second end of the channel, wherein the recessed luminaire further comprises a locking mechanism, wherein the locking mechanism is arranged to secure the first end of the lever portion to the securement plate at the first end of the channel, at the second end of the channel, or at an intermediate position between the first end and the second end. 
     Generally, in one aspect, an outer box assembly for installation of a luminaire is provided. The outer box assembly comprises: an outer box having a cavity, the outer box arranged to receive the recessed luminaire; an installation cover having an interior surface, the installation cover arranged to cover the cavity of the outer box; and one or more connectors arranged on the interior surface of the installation cover, wherein the one or more connectors are arranged to receive one or more cables to allow the cables to connect to the installation cover. 
     In an aspect, the cable is arranged to connect to the installation cover at the one or more connectors or to the recessed luminaire at one or more luminaire cable connectors of the luminaire. 
     In an aspect, the recessed luminaire further comprises an electric power source arranged to provide power to the one or more connectors on the installation cover. 
     In an aspect, the recessed luminaire arranged within the cavity of the outer box is arranged to sit flush with the ground. 
     In an aspect, the installation cover is arranged to seal the cavity of the outer box from dirt and moisture. 
     Generally, in one aspect, a gasket for a luminaire is provided. The gasket comprises: a first surface in contact with a cover of the luminaire; a second surface in contact with a housing of the luminaire, wherein the housing comprises a first portion having a first height and a second portion having a second height, wherein the second height is less than the first height, wherein the first portion of the housing and the second portion of the housing are adjacent to the gasket, and wherein the second portion of the housing or the second surface of the gasket have an indentation. 
     In an aspect, the gasket further comprises a first vertical component substantially perpendicular to a reference surface, the first vertical portion having a first end and a second end; a first horizontal component substantially parallel to the reference surface, the first horizontal portion having a third end and a fourth end, the third end integrally connected to the second end of the first vertical component; a second vertical component substantially perpendicular to the reference surface, the second vertical portion component having a fifth end and a sixth end, the fifth end integrally connected to the fourth end of the first horizontal component; and a second horizontal component substantially parallel to the reference surface, the second horizontal portion having a seventh end and an eight end, the seventh end integrally connected to the sixth end of the second vertical component, wherein the first vertical component, the first horizontal component, the second vertical component, and the second horizontal component are annular about and arranged about a cover of a light unit. 
     In an aspect, the gasket further comprises sealing bumps arranged on a first external surface of the second horizontal component of the gasket. 
     In an aspect, the gasket further comprises an indentation on the second horizontal component, wherein the second horizontal component further comprises a first portion having a first height and a second portion having a second height, wherein the second height is less than the first height. 
     Generally, in one aspect, a recessed luminaire is provided. The recessed luminaire comprises: a housing having a glass cover, wherein the recessed luminaire is arranged to be installed below ground; a dehumidifier having a first surface on the interior of the housing and a second surface on the exterior of the housing; and a humidity sensor arranged on, within, or in proximity to the housing, wherein the humidity sensor is configured to provide a feedback loop to the dehumidifier for maintaining internal relative humidity. 
     It should be appreciated that all combinations of the foregoing concepts and additional concepts discussed in greater detail below (provided such concepts are not mutually inconsistent) are contemplated as being part of the inventive subject matter disclosed herein. In particular, all combinations of claimed subject matter appearing at the end of this disclosure are contemplated as being part of the inventive subject matter disclosed herein. It should also be appreciated that terminology explicitly employed herein that also may appear in any disclosure incorporated by reference should be accorded a meaning most consistent with the particular concepts disclosed herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the drawings, like reference characters generally refer to the same parts throughout the different views. Also, the drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. 
         FIG. 1  is a recessed luminaire according to aspects of the present disclosure. 
         FIG. 2  is a cross-sectional view of a recessed luminaire according to aspects of the present disclosure. 
         FIG. 3  is a cross-sectional view of a recessed luminaire according to aspects of the present disclosure. 
         FIG. 3A  is a cross-sectional view of a recessed luminaire according to aspects of the present disclosure. 
         FIG. 4  is an illustration of heat dissipation from a recessed luminaire. 
         FIG. 5  is an illustration of heat dissipation from a recessed luminaire according to aspects of the present disclosure. 
         FIGS. 5A and 5B  are illustrations of thermal straps according to aspects of the present disclosure. 
         FIG. 6  is a cross-sectional view of a recessed luminaire according to aspects of the present disclosure. 
         FIGS. 7A-7G  are illustrations of an outer box and installation cover for a recessed luminaire according to aspects of the present disclosure. 
         FIG. 8  is a cross-sectional view of a recessed luminaire and gasket according to aspects of the present disclosure. 
         FIG. 9  is a cross-sectional view of a recessed luminaire according to aspects of the present disclosure. 
         FIG. 10  is a cross-sectional view of a recessed luminaire and gasket according to aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure is directed to in grade light fixtures and recessed luminaires and subassemblies thereof, and more specifically, but not exclusively, to in grade light fixtures including a heat sink and pivot for a light subassembly of the light fixture, a gasket for the cover of the light fixture, an installation cover for an outer box for installation of the light fixture. The recessed luminaire comprises a heat sink in contact with a light subassembly and a pivot on a side of the heat sink which provides a conduction path through the housing of the luminaire. The gasket has a plurality of components which allow the cover of the in grade light fixture to receive force without breaking the seal between the cover and the housing of the recessed luminaire. An outer box used during installation of the recessed luminaire has an installation cover having connectors for electric cable for installing the recessed luminaire. The connectors secure and protect the cable. Additional features and advantages of the inventive in grade light fixtures and recessed luminaires and subassemblies thereof are disclosed herein. 
     Referring to  FIG. 1 , an in grade light fixture or a recessed luminaire  2  is shown. The recessed luminaire  2  has a cover  4  and housing  6 . The cover  4  of the recessed luminaire  2  may include a lens such as a circular lens and may be made of glass.  FIGS. 2, 3 and 3A  show cross-sectional views of the recessed luminaire  2 . Within the housing  6  of the recessed luminaire  2 , there is a light subassembly  8  engaged with a thermally conductive body  10 . The light subassembly  8  contains lighting elements which radiate light. These lighting elements may be, for example, a number of LEDs of any type or other light emitting diodes or the like. 
     The light subassembly  8  has a first end  53  and a second end  54 . The first end  53  of the light subassembly  8  is pivotally secured to a pivot  16  arranged on, in, or proximate to an internal surface  18  of the housing  6  at a pivot point. The light subassembly  8  may connect directly to the pivot  16  (shown in  FIGS. 2 and 3A ) or may be connected to the pivot  16  by an intermediate object, such as the thermally conductive body  10  (shown in  FIG. 6 ).  FIG. 2  shows a pivot  16  comprising a first pivot component  20  integral to or removably secured to the internal surface  18  of the housing  6  and a second pivot component  22  integral to or removably secured to the light subassembly  8 . The second pivot component  22  is non-rotatably connected to the light subassembly  8 . The second pivot component  22  is arranged to rotate about the first pivot component  20  at the pivot point. The first pivot component  20  and the second pivot component  22  are arranged such that the second pivot component  22  rotates with respect to an imaginary plane  28  which passes through the first pivot component  20  and/or the second pivot component  22 . The second pivot component  22  rotates about an axis  52  (shown in  FIG. 3 ). 
       FIG. 3  shows a thermally conductive body  10  pivotally secured to a pivot  16  arranged on, in, or proximate to an internal surface  18  of the housing  6  at a pivot point. The pivot  16  comprises a first pivot component  20  integral to the internal surface  18  of the housing  6  and a second pivot component  22  integral to the thermally conductive body  10 . The first pivot component  20  is a concave ledge arranged to receive the second pivot component  22  which is convex and sits flush with the first pivot component  20 . The second pivot component  22  is arranged to rotate within the first pivot component  20  without releasing from the first pivot component  20 . The first pivot component  20  and the second pivot component  22  may be connected by a partial friction fit where part of the first pivot component  20  and part of the second pivot component  22  make contact so that the force of friction operates between them. 
     Referring to  FIGS. 2 and 3 , the pivot  16  is located at a first distance  24  away from the cover  4  of the housing  6 . The thermally conductive body  10  is arranged to rotate around the pivot point. The second pivot component  22  integrally connected to the thermally conductive body  10  is arranged to rotate a first rotational amount  26  in a first rotational direction RD 1  with respect to a first imaginary horizontal plane  28  through the first pivot component  20  and substantially parallel with the cover  4  of the housing  6 . The first rotational amount  26  ranges from approximately 0.5° to 6°. The first rotational amount  26  is preferably approximately 3°. The thermally conductive body  10  is arranged to rotate a second rotational amount  30  in a second rotational direction RD 2  with respect to the first imaginary horizontal plane  28 . The second rotational amount  30  ranges from approximately 10° to 20°. The second rotational amount  30  is preferably approximately 15°. 
     Rotation of the thermally conductive body  10  and the light subassembly  8  engaged with the thermally conductive body  10  about the pivot point in the RD 2  direction is obstructed by the cover  4  of the housing. In an example, the light subassembly has a light cover  32  (shown in  FIG. 2 ). The light cover  32  may be a decorative cover arranged over one or more light bulbs of the light subassembly  8  and may be clear or translucent to permit the passage of light. The light cover is bent in the X direction away from the cover  4  of the housing  6  on the end which will be closest to the housing  6  cover  4  when the light subassembly  8  is rotated along the RD 1  direction. This permits additional rotation of the light subassembly  8  arranged on the thermally conductive body  10  in the RD 1  direction. The pivot  16  is arranged on a first end  12 ,  53  of the thermally conductive body  10  or light subassembly  8  such that the length of the thermally conductive body  10  or the light subassembly  8  on the first end  12 ,  53  that is separated from the second end  14 ,  54  by the pivot  16  is short enough to not obstruct the rotation of the thermally conductive body  10  or the light subassembly  8  in the RD 1  and RD 2  directions. 
     With this configuration, the tilt location, being off center, allows the LED board (light subassembly  8 ) to be closer to the lens (in cover  4  of the recessed luminaire  2 ). This allows more light to exit the recessed luminaire  2  and not be cutoff by the side walls of the luminaire housing. This advantage is best seen when considering the position of the LED board when the board is parallel with the lens. In the off center tilt location as shown in  FIGS. 2-3 , the LED board is very close to the bottom of the lens when at the parallel angle. However, if the tilt location was in the center of the thermally conductive body, the position of the light subassembly would need to be much further away from the cover to allow a similar range of motion of the LED board. By configuring a pivot joint that puts the metal heatsink in direct contact with the metal external housing, a conduction heat transfer path is created. In an example, the pivot joint is designed in such a way that it is a shaft and a partial bore. The joint allows the heatsink to rotate inside of the housing, while still transferring heat through the joint through conduction. By adding this path the LED temperatures are greatly reduced compared to just relying on convection and radiation. 
     Referring to  FIGS. 2 and 3 , the thermally conductive body  10  is in thermal contact with the second pivot component  22  of the pivot  16 , the second pivot component  22  is in thermal contact with the first pivot component  20 , and the first pivot component  20  is in thermal contact with the internal surface  18  of the housing  6 . Thus heat is dissipated away from the light subassembly  8  along the thermally conductive path from the thermally conductive body  10 , through the pivot  16 , and through the housing  6 . 
       FIG. 4  shows heat flow or heat flux in luminaires without a thermally conductive path from the light subassembly  8  to the housing  6 . Areas with different levels of heat are indicated in different shades of gray. The direction of heat flow is indicated by the direction of arrows. Heat flows by convection and radiation away from the light subassembly  8 . The area  34  shaded in dark gray near the light subassembly  8  has greater heat and is adjacent to an area  36  of lighter gray, which indicates that heat from the dark gray area  34  does not dissipate as much to surrounding areas  36  which are much cooler and shaded in lighter gray. 
       FIG. 5  shows heat flow indicated by arrows in luminaires with a thermally conductive path from the light subassembly  8  to the housing  6  according to the present disclosure. Areas with different levels of heat are indicated in different shades of gray, and the direction of heat flow is indicated by the direction of arrows. Heat flows from the lighting subassembly  8  and thermally conductive body  10 , through the pivot  16 , and through the housing  6  of the recessed luminaire  2 . The lighting subassembly  8 , thermally conductive body  10 , the pivot  16 , and the housing  6  are shaded in similar shades of gray. Heat flows from the light subassembly  8  to the thermally conductive body  10 , through the pivot  16 , and through the housing  6  which dissipates the heat. The flow of heat reduces the accumulation of heat on the lighting subassembly  8  or thermally conductive body  10 . The thermally conductive body  10 , pivot  16 , and housing  6  may be made of highly thermally conductive materials such as metal. The amount of heat transfer along the conduction path is directly related to the material selected, the cross-sectional area of the path through the pivot, and the length of the path. In one example, the thermally conductive body  10  may have a plurality of fins  34  arranged to increase dispersion of heat from the thermally conductive body  10 . The thermally conductive path may also be created using a thermal strap  37  (shown in  FIGS. 5A and 5B ) which is typically made from materials with very high in plane conductivity, such as copper and graphite. The thermal strap  37  may be incorporated into the housing  6  and thermally conductive body  10 . The thermal strap  37  may be made of flexible material which can flex as the light subassembly  8  is rotated. The thermal strap  37  transfers heat via conduction from the light subassembly  8  to the housing  6 . The thermal strap  37  may also extend completely under the light subassembly  8  (shown in  FIG. 5B ) so that heat goes from the light subassembly  8  through the light subassembly&#39;s thickness and directly into the strap  37  without having to go through other structural features first. This way heat moves into the thermal strap  37  and can move in plane very efficiently to the housing  6 . 
     The recessed luminaire  2  may further includes a lever  42  to change the angle of the light subassembly  8  and the direction that light shines from the recessed luminaire  2 . As shown in  FIG. 6 , a gear plate  40  is non-rotatably secured to at least a portion of the thermally conductive body  10  inside the recessed luminaire  2 . The gear plate  40  may be integral to the thermally conductive body  10 . The gear plate  40  and the thermally conductive body  10  may be connected to each other directly. Alternatively, the gear plate  40  may be connected to one or more intermediate components which connect to the thermally conductive body  10 . The gear plate  40  is non-rotatably secured to at least a portion of the thermally conductive body  10  which means that the gear plate  40  and the thermally conductive body  10  cannot rotate with respect to each other. The gear plate  40  has a first set of gear teeth  44  which are indentations on a toothed surface of the gear plate  40 . 
     The recessed luminaire  2  also comprises a lever  42  comprising a first lever portion  46  and a second lever portion  48  which are non-rotatably connected. The first lever portion  46  and the second lever portion  48  are arranged to pivot about a lever pivot point  50 . When the first lever portion  46  is rotated a first amount, the second lever portion  48  is rotated a second amount, where the second amount is in proportion to the first amount. 
     The first lever portion  46  has a first end and a second end. The first end extends outside the housing  6  of the recessed luminaire  2  and is accessible by a user during or after installation of the luminaire  2 . The second end of the first lever portion  46  is pivotally connected to the second lever portion  48  at the lever pivot point  50 . The first lever portion  46  has two substantially parallel sides which extend from the first end to the second end of the first lever portion  46  generally along the Y direction. 
     The lever pivot point  50  may be fixedly secured to the housing  6  on an exterior surface of the housing  6 . The lever pivot point  50  may be located at a second distance away from the interior surface  18  of the housing  6  along the X axis direction and a third distance away from the pivot  16  which allows the thermally conductive body  10  to rotate along the X axis direction. In this way, the point at which the thermally conductive body  10  rotates and the point at which the first lever portion  46  rotates, the pivot point  50 , are located at different distances in the X direction away from the interior of the housing. 
     The second lever portion  48  has a first end and a second end. The first end of the second lever portion  48  is connected to the first lever portion  46  at the lever pivot point  50 . The second end of the second lever portion  48  has a second set of gear teeth  56  which are arranged on a toothed side of the second lever portion  48 . At least a portion of the second set of gear teeth  56  of the second lever portion  48  are arranged to engage with at least a portion of the first set of gear teeth  44  of the gear plate  40 . 
     In an example, the second lever portion  48  has two sides, a first side and a second side, which extend from the first end of the second lever portion  48  to the second end of the second lever portion  48  and are non-parallel such that the first end is narrower than the second end of the second lever portion  48 . The toothed side of the second lever portion  48  extends from the first side to the second side of the second lever portion  48  and has a plurality of indentations which are of similar size and shape as the first set of gear teeth  44  of the gear plate  40  so as to allow at least a portion of the second set of gear teeth  56  of the second lever portion  48  to engage with at least a portion of the first set of gear teeth  44  of the gear plate  40 . As an example, the toothed side of the second lever portion  48  is curved and convex. The second lever portion  48  has a first surface which faces the gear plate  40  in the direction of the Z axis and a second surface which faces the thermally conductive body  10  in the direction of the Z axis opposite the first surface. 
     In an example, the gear plate  40  has a first surface which faces away from the second lever portion  48  in the direction along the Z axis and a second surface which faces the second lever portion  48  in the direction along the Z axis opposite the first surface. The first surface of the gear plate  40  is adjacent to the second surface of the second lever portion  48 . Along the second end of the gear plate  40  is a protrusion which extends in the direction of the Z axis. The protrusion has a toothed side which faces in the direction along the X axis which faces the lever pivot point  50 . In an example, the toothed side is concave and has the first set of gear teeth  44 . Alternatively, the gear plate  40  may have a convex side with the first set of gear teeth  44 . The second lever portion  48  is arranged at a distance from the gear plate  40  in the direction along the Z axis so that at least a portion of the second set of gear teeth  56  engage with the first set of gear teeth  44 . The gear plate  40  is arranged between the thermally conductive body  10  and the second lever portion  48 , and the gear plate  40  is secured to the thermally conductive body  10 . 
     The first end of the first lever portion  46  extends outside the housing  6  of the recessed luminaire  2  such that it is accessible to a user during installation of the light or after installation. The first end of the first lever portion  46  is arranged to move through a channel  58  of a securement plate  60  which is arranged on the exterior of the housing  6  of the recessed luminaire  2 . The securement plate  60  is positioned outside the housing  6  and is positioned proximate to the cover  4  of the recessed luminaire  2 . The securement plate  60  is arranged to receive the first end of the first lever portion  46  in its channel  58  and permit the first end of the first lever portion  46  to move within the channel  58 . For example, the securement plate  60  may be positioned in a groove in the cover  4  of the recessed luminaire  2 . The securement plate  60  has a channel  58  running from the first end of the securement plate  60  to the second end of the securement plate  60 . The securement plate  60  is fixedly secured to the housing  6  or cover  4  of the recessed luminaire  2 . The securement plate  60  is arched in the direction along the Y axis away from the lever pivot point  50 . 
     The first end of the first lever portion  46  can be secured by a locking mechanism  68  so that it does not move further along the channel  58  of the securement plate  60 , at the first end  62  of the channel  58 , the second end  64  of the channel  58 , or along an intermediate position  66  between the first end  62  and the second end  64  of the channel  58 . The locking mechanism  68  may be a screw arranged to engage with a recess on the first end of the first lever portion  46  having an inner circumferential surface with a plurality of female recesses arranged to rotationally engage with a male helical thread on a threaded portion of the screw. The locking mechanism  68  may be any other mechanism which secures the first lever portion to the securement plate  60 , including a nail, a clasp, a protruding tab, or any combination of these mechanisms or other known mechanisms. 
     Referring to  FIGS. 7A through 7G , the recessed luminaire  2  may be installed using an outer box  70  which is inserted into a hole dug into the ground. The outer box  70  is used during installation of the recessed luminaire  2  to provide a cavity for the recessed luminaire  2  and for cables  72  providing an electrical connection for the luminaires  2 . The outer box  70  has an interior surface, an exterior surface, and a cavity  78  surrounded by the interior surface. An installation cover  80  is arranged to cover the cavity  78  of the outer box  70 . The installation cover  80  has a circular top wall with annular side walls which protrude along the periphery of the top wall. The outer box  70  has a lip which the annular side walls of the installation cover  80  contact to seal the cavity  78  of the outer box  70  from water, dirt, or other contaminants. The outer box  70  may be waterproof or it may not be waterproof and use various other ways to remove water, including drain holes. While illustrated as a cylinder shaped outer box  70  in  FIGS. 7A through 7G , the outer box  70  and installation cover  80  may be of any shape. 
     The installation cover  80  has a plurality of connectors  82  arranged on an interior surface  74  of the circular top wall. The plurality of connectors  82  are accessible to electrical cables which are in the cavity  78  of the outer box  70 . Before the recessed luminaire  2  is installed in the outer box  70 , the electrical cable  72  which is used to provide power to the recessed luminaire  2  is attached to the installation cover  80  of the outer box  70  using one or more of the plurality of connectors  82 . The electrical cable  72  can be managed during the process of installing the luminaires  2  so that the electrical cable  72  does not tangle, does not get pulled away from the outer box  70 , and an appropriate length of cable  72  is saved to be connected to the recessed luminaire  2  which is to be installed in the outer box  70 . This is particularly helpful when more than one recessed luminaire  2  is installed at once and multiple outer boxes  70  are installed. When electrical cable is drawn from one outer box  70  to another outer box  70  during the installation process, the connectors  82  on the installation covers  80  can be used to reserve an appropriate length of cable  72  for the recessed luminaires  2  before they are installed. The cable  72  ends are also protected from dirt, water, and other contaminants because they are connected to the connectors  82  and are not left loose in the outer box  72 . The installation cover  80  may also be sealed to prevent dirt, water, and other contaminants from entering the outer box  70  and damaging the connectors  82 . 
     The outer box  70  has a plurality of cable conduits  84  (shown in  FIG. 7B ) through which electric cables  72  may enter the outer box  70  or exit the outer box  70 . When cables  72  enter or exit the outer box  70 , the cable conduits  84  may be sealed to prevent dirt, water, or other contaminants from entering the outer box. The outer box  70  and the installation cover  80  may be secured by friction fit, a twist and lock mechanism, or any other mechanical connection means to seal the cavity  78  of the outer box  70  from dirt, water, or contaminants. 
     The connector  82  of the installation cover  80  may be molded into the installation cover  80 . The connector  82  may comprise a first cable connector component arranged on an interior surface of the installation cover and a second cable connector component integrally connected to the cable. The first cable connector component may be integrally connected into the installation cover and may be molded into the installation cover. The connector  82 , the first cable connector component, and/or the second cable connector component may be shaped asymmetrically around an axis going through the center of the surface on which the connector and cable meet when the cable  72  is connected to the connector  82 . This asymmetry prevents the cable  72  from twisting while installed in the installation cover  80  or becoming removed from the installation cover  80 . 
     The connectors  82  on the installation cover  80 , the first cable connector component, and the second cable connector component are arranged to allow the cables  72  to be connected and disconnected from the installation cover  80 . The recessed luminaire  2  has one or more luminaire cable connectors  86  (shown in  FIGS. 2 and 6 ) into which one or more electrical cables  72  can be connected. The luminaire cable connectors  86  are cavities in the interior of the luminaire housing  6  which are accessible by openings on the exterior of the housing  6 . The openings have cross-sections which are circular in shape and have protrusions outside the circle which make the shape of the cross-sections asymmetric. Once the recessed luminaire  2  is installed in the outer box  70 , the recessed luminaire  2  is arranged to sit flush with the ground and portions of the outer box  70  are arranged to sit below the ground or sit flush with the ground. 
     The outer box  70  may further include an electric connector bridge  88 , shown schematically in  FIG. 7F , arranged to electrically connect the cables  72  so that each installation cover  80  with cables  72  can be electrically connected in a linear series or daisy chained so that during installation a single power source can provide power to the luminaires  2 . An electric power source can be selected from a battery, super capacitor, mains power source, or any other source capable of providing electric power or charge through the connectors  82  to the cables  72 . 
     As shown in  FIG. 7G , the in grade light fixture  2  which is installed below the ground  96  (shown in  FIGS. 7D-7F ) may further include a dehumidifier  90 . The dehumidifier  90  may be used to set a humidity range inside a product and vent to the outside environment. The dehumidifier  90  may allow pressure to equalize and reduce stress on seals. The dehumidifier  90  may also prevent the internal humidity from reaching 0% RH, which can be prevented, for example, by using a feedback loop to maintain an ideal humidity range. This is in contrast the use of desiccants as dehumidifiers, where the humidity can go to 0% RH which can dry out internal electronics and cause damage. As an example, the dehumidifier  90  may utilize a regenerating desiccant. The dehumidifier  90  may be installed in the housing  6  of the recessed luminaire  2  such that the dehumidifier  90  has one surface on the interior of the housing  6  and one surface on the exterior of the housing  6 . The dehumidifier  90  may be an electromechanical dehumidifier having a breathable membrane and a radial seal which provides a seal while also providing pressure equalization. The dehumidifier  90  may include a desiccant which absorbs moisture from the recessed luminaire  2 . The desiccant can also release moisture to the atmosphere through a first vent or pump which is opened and closed to the outside environment. An additional breathable vent may provide pressure equalization when the first vent or pump is opened and provide a barrier from dirt, water, or other contaminants entering the recessed luminaire  2 . A humidity sensor  92  may be arranged, on, within, or in proximity to the housing  6  and may be configured to provide a feedback loop to the dehumidifier  90  for maintaining internal relative humidity. 
     Referring to  FIG. 8 , the in grade luminaire  2  has a gasket  100  between the cover  4  of the recessed luminaire  2  and the housing  6  of the recessed luminaire. The gasket  100  provides strength to the cover  4  from forces on the cover  4  of the recessed luminaire  2 . For example, a recessed luminaire  2  which is in the ground may have to withstand the weight of objects on the luminaire, such as people and/or vehicles. In an example shown in  FIG. 8 , the gasket  100  has a first surface  150  which is in contact with the cover  4  of the recessed luminaire  2 . The gasket  100  has a second surface  152  which is in contact with the housing  6  of the luminaire  2 . The housing  6  of the luminaire includes a first portion  138  having a first height and a second portion  142  having a second height. The second portion  142  of the housing  6  has an indentation  136 , and the second height is less than the first height. The first portion  138  of the housing  6  and the second portion  142  of the housing  6  are adjacent to the gasket  100 . The housing  6  limits how much the gasket  100  can be compressed when force is applied to the cover  4  of the recessed luminaire  2 . The gasket  100  provides a seal between the cover  4  and the housing  6  and may include a c-channel style gasket, an o-ring, or a dispensed adhesive seal. The first portion  138  of the housing  6  may be integral to the housing or may not be integral to the housing. In an example, the first portion  138  of the housing  6  is not integral to the housing  6  and is a separate component that provides the height difference. The stiffness of the first portion  138  of the housing  6  is much greater than that of the gasket  100 . The first portion  138  should be able to withstand the force generated by the weight of a vehicle or load to the cover  4 . If the first portion  138  is not sufficiently stiff, it too would deflect and the force would be transferred to the gasket  100 . In an example, the first portion  138  is made of metal or has metal components. 
     In an example shown in  FIG. 9 , the housing  6  of the recessed luminaire  2  is secured to the gasket  100  by a bezel clamp  102  which may be tightened by screws inserted into screw holes  104 . The cover  4  of the recessed luminaire  2  comprises a circular lens inserted into a c-shaped channel of the gasket.  FIG. 10  is a cross-sectional view of an exemplary cover  4  of the recessed luminaire  2 . The gasket  100  has a first vertical component  106  substantially perpendicular to a reference surface  108  which is the top surface of the cover  4  of the recessed luminaire  2 . The first vertical component  106  has a first end  110  and a second end  112 . A first horizontal component  114  of the gasket  100  is substantially parallel to the reference surface  108 . The first horizontal component  114  has a third end  116  and a fourth end  118 , where the third end  116  is integrally connected to the second end  112  of the first vertical component  106 . A second vertical component  120  of the gasket  100  is substantially perpendicular to the reference surface  108 . The second vertical portion  120  component has a fifth end  122  and a sixth end  124 , where the fifth end  122  is integrally connected to the fourth end  118  of the first horizontal component  114 . The gasket  100  also has a second horizontal component  126  substantially parallel to the reference surface  108 . The second horizontal portion  126  has a seventh end  128  and an eight end  130 , where the seventh end  128  is integrally connected to the sixth end  124  of the second vertical component  120 . The first vertical component  106 , the first horizontal component  114 , the second vertical component  120 , and the second horizontal component  126  are annular about and arranged about a cover  4  of the recessed luminaire  2 . The first vertical component  106 , the first horizontal component  114 , the second vertical component  120 , and the second horizontal component  126  each have a surface which contacts the cover  4 , and the cover  4  is inserted in the c-shaped channel created by the first horizontal component  114 , the second vertical component  120  and the second horizontal component  126 . The cover  4  may comprise a clear or translucent lens and an outer casing for the lens. In one example, the gasket  100  further comprises sealing bumps  132  arranged on a first external surface  134  of the second horizontal component  126  of the gasket  100 . In one example, the gasket  100  further comprises an indentation  136  on the second horizontal component  126 . The housing comprises a first portion  138  having a first height and a second portion  142  having a second height, where the second height is less than the first height. The first portion  138  of the housing  6  and the second portion  142  of the housing  6  are adjacent to the gasket  100 . The protrusion created by the first portion  138  of the housing  6  into the indentation  136  in the gasket  100  limits the height that the gasket  100  can compress. This compression limiting feature protects the seal from being over compressed by force applied to the top surface of the cover  4 . 
     While several inventive embodiments have been described and illustrated herein, those of ordinary skill in the art will readily envision a variety of other means and/or structures for performing the function and/or obtaining the results and/or one or more of the advantages described herein, and each of such variations and/or modifications is deemed to be within the scope of the inventive embodiments described herein. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the inventive teachings is/are used. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific inventive embodiments described herein. It is, therefore, to be understood that the foregoing embodiments are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, inventive embodiments may be practiced otherwise than as specifically described and claimed. Inventive embodiments of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein. In addition, any combination of two or more such features, systems, articles, materials, kits, and/or methods, if such features, systems, articles, materials, kits, and/or methods are not mutually inconsistent, is included within the inventive scope of the present disclosure. 
     The phrase “and/or,” as used herein in the specification and in the claims, should be understood to mean “either or both” of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with “and/or” should be construed in the same fashion, i.e., “one or more” of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the “and/or” clause, whether related or unrelated to those elements specifically identified. As used herein in the specification and in the claims, “or” should be understood to have the same meaning as “and/or” as defined above.