A trim member for a lighting device module includes an annular body having a first end portion that is connectable to a housing of the lighting device module and has a light receiving opening, and a second end portion opposite to the first end portion. The second end portion has a light emitting opening and is configured to be positioned outside of the housing of the lighting device module. A first curved or tapered surface extends from the light receiving opening toward the light emitting opening, and has a diameter that increases toward the light receiving opening. A second curved or tapered surface extends from the first curved or tapered surface to the light emitting opening, and has a diameter that increases toward the light emitting opening.

A reflector and of a holding-plate slidingly attach to each other to form a flangeless trim assembly. The reflector may be removably attached to a spackle-frame. The spackle-frame may be installed within ceiling drywall around a hole for a downlight. The holding-plate may be attached to a lighting module. In a default resting configuration, a top of the reflector butts up against a bottom of the holding-plate because springs push these two parts towards each other. When an opposing force is applied that is greater than the spring's force, then a variable gap is formed between the reflector and the holding-plate, but while the reflector and the holding-plate are still attached to each other. This gap may be used by human finger(s) to both disengage the reflector from the spackle-frame and to pull down the reflector, the holding-plate, and the lighting module from the spackle-frame—all without tools.

The present invention is related to an illumination system that enables installation conditions to be simplified, such that the gap area of the wall, ceiling or floor wherein said illumination system is integrated is minimised, in addition to facilitating the insertion of the electrical contacts of the functional unit and enabling the concealment thereof to be carded out without modifying the conductive properties thereof, minimising all the functional elements arranged inside the gap of the wall ceiling or floor.

A configurable lighting assembly for use in suspended ceiling grid systems which provides novel T-Bar mounting options. The lighting assembly comprises two configurable length linear lighting modules in a novel parallel arrangement. End plates support, and enclose longitudinal ends of the elongate body of each linear lighting modules and are used to set a configured width and functional gap spacing of the linear lighting modules. The end plates further connect and support the lighting assembly when fixed or mounted or removably to T-Bars positioned at either or both perpendicular and parallel alignment angles.

Lighting assemblies with various embodiments of end plates and linear lighting modules are presented, each with novel mounting characteristics. In some cases the lighting assembly mounts perpendicularly on its end and spans the gap between two T-Bars. In other cases the lighting assembly mounts longitudinally on a single T-Bar. Finally, embodiments are shown where the lighting assembly mounts both perpendicularly and longitudinally to different T-Bars in a ceiling grid layout.

The lighting assembly further comprises a novel arrangement of LED light sources, transmissive optical elements, light shaping lenses, reflectors and other functional components supported and housed within the elongate body of each linear lighting module. The transmissive optical elements may be backlit or edgelit from one or two sides and aligned horizontally or tilted relative to the ceiling grid plane. The lighting assembly can provide a range of useful symmetric, asymmetric and tilted non-lambertian lighting distributions.

A lighting fixture includes a housing, a first light source, a light guide plate, and a second light source. The housing has an inner cavity and a mounting hole, the mounting hole communicates the inner cavity with an external environment of the housing, the light guide plate is installed in the mounting hole. A side of the light guide plate faces the inner cavity, the other side of the light guide plate faces an outside of the housing. The second light source projects second light to the light guide plate, the second light is capable of being projected to the outside of the housing through the light guide plate. The first light source projects first light, and is configured such that the first light is projected to the outside of the housing through the light guide plate, and the housing is a non-light-transmitting housing.

Technologies are described for a system for mounting a louver, a lens, or a rectangular or square light LED light source to a ceiling support grid. A mounting frame has at least one fixed flat extension extending from the first side and at least one retractable extension on a second side. The mounting frame is configured to be inserted into a grid opening and mounted to the grid and provide a frame for the mounting of a louver, a lens, or a rectangular or square light LED light source to the ceiling support grid.

A structural beam and light fixture for a walkable ceiling of a clean room is composed of an elongated channel and a lamp disposed in the elongated channel. The lamp is configured to direct light through the bottom side of the elongated channel. The structural beam and light fixture is attached to adjoining ceiling components and is configured to support a load applied to the adjoining ceiling components. The structural beam and light fixture, combined with other walkable ceiling components, define ceiling top and bottom sides that are flush.

A retrofit trim lighting device is provided. In example embodiments, the retrofit trim lighting device comprises a bracket comprising an opening; at least one torsion spring secured to the bracket and configured to mount the retrofit trim lighting device within a recessed housing; a retrofit housing comprising at least one light engine; and an engagement element. The engagement element is secured to the retrofit housing through the opening of the bracket such that, when so secured, the retrofit housing and the bracket are rotatable relative to one another.

An air frame system includes a frame body defining one or more openings, a plurality of air passages along an inner periphery of the one or more openings, and an airframe grid coupled to the frame body. The airframe grid includes at least one wireway channel therein and a wireway channel cover clip is removably coupled to the at least one wireway channel. The air frame system also includes a light assembly removably coupled to the airframe grid, and a retainer clip removably coupled to the airframe grid. The airframe grid retains the light assembly within the airframe grid.

A light fixture, for a ceiling plenum system defining an upstream space and a downstream space, includes a light-fixture base defining a light-fixture axis. First and second side walls extend toward the downstream space and are sealingly attached to the base plate and to first and second end plates. First and second legs are sealingly attached to the light-fixture base by one of a first-leg continuously welded joint and a first-leg monolithic connection. A downstream end of each leg forms a knife portion. First and second gas filters each comprise an orthogonal gas-filter frame defining an interior perimeter and an exterior perimeter. A trough with sealant affixed therein is sealingly attached to and surrounds a portion of the exterior perimeter. A trough opening faces the downstream space, with the knife portions penetrating surfaces of the sealant, forming a seal between the light-fixture base and each gas filter.