A light fixture delivering electrically controlled lighting distributions for mounting within an installed panel system typically used in ceiling and wall constructions and incorporating acoustic, drywall or wood panels. The light fixture can provide low-glare or wide spread “batwing” ambient light or more directional wall wash, task and accent lighting. The light fixture comprises one or more LED boards and an optical element which can be back-lit or edge-lit. The light fixture body is configurable, comprising a 3-dimensional extruded elongate body with its ends cut at a configured angle. The body typically comprises additional side support features that support and enclose the edge of installed panels. In the case of a T-bar based ceiling grid system the side support features may also replicate the function and appearance of T-bar horizontal and vertical portions. The body comprises features to retain and align LED boards, reflectors and a back-lit or edge-lit optical element. In the edge-lit configuration the optical element may also be a light guide. The edge-lit design also enables the height of the lighting assembly body to be equivalent to or less than the height of T-bar main beams or cross tees. This is very important in applications where there is zero or little available plenum space above the ceiling grid. Because the lighting assembly can also provide structural support within the installed panel system it can replace one or more T-bars and can also be used to connect one or more T-bars or other structural grid elements. The lighting fixture can be mounted at an oblique or diagonal angle to the typical square grid layouts, or in a corner of a ceiling grid T-bar cell at the intersection of one or more T-bars. Additionally, more than one elongate bodies can be connected to form square, crosses, curves or arcs or more complex shapes. The electrical power may additionally be configured to control lighting distributions of the fixtures independently of one another.

A optically transmissive component is configured within a light fixture to provide benefits in brightness uniformity and visual appearance with the use of a light scattering extension portion that provides light scattering of light emitted from near an input edge of a light guide or other edgelit optical element. The sequential propagation of light through both the extension portion and main portion of the optically transmissive component significantly reduces the higher brightness and uneven “hotspotting” type visual defects typically produced near the input edge of an edgelit optical system. With appearance constraints removed or reduced, edgelit light fixtures with higher output, higher efficacy, and/or simplified edgelit optical components are enabled. Embodiments include the use of the extension portion of the optically transmissive component extension to mechanically position and retain an edgelit optical element within a light fixture.

A ceiling system for a clean room, a clean room ceiling and a method for constructing a ceiling for a clean room are provided. T-shaped beams support the ceiling from a building structure. Channels support composite panels on the bottom side of the T-shaped beams. Each of the channels is attached to the top side of a composite panel and each engages a first or second leg of a T-shaped beam. The channels may be Z-channels.

An edgelit multifunctional lighting assembly is configured as a cross tee within a suspended ceiling system and supports at least one ceiling panel and is configurable to produce symmetric and asymmetric targeted light distributions for narrow and wide angle illumination applications.

A ceiling grid lighting assembly for use in suspended ceiling systems is provided with multiple linear lighting modules in parallel arrangement. End plates are used to connect, support, and enclose longitudinal ends of the elongate body of each linear lighting modules while simultaneously functioning as reflective faces for optical cavities. A configured gap spacing between individual linear lighting modules can be used to house and support components such as additional light sources, acoustic or decorative panels, HVAC components, or power systems, controls or sensors. The end plate can also be configured to allow a T-bar to be placed in the configured gap spacing thereby enabling the mounting of the assembly in-line upon the longitudinal axis of a ceiling grid T-bar. Embodiments of linear lighting modules are presented comprising LED light sources, light guides and diffusers housed within the elongate body. The light guides may be edgelit from one or two sides and aligned horizontally or tilted relative to the ceiling grid plane.

This invention relates generally to a lock for securing clips used to hold a panel to a wall or ceiling. It includes a panel assembly covering a back surface of a ceiling with a panel, comprising: the panel held face to face with the back surface by a link between a first clip and a second clip; a lock for securing the clips linked together comprising a shim and a flexible wedge connected together; at least a first fastener which connects the wedge to the back surface at a location outside the perimeter of the panel; wherein the shim intermediate the wedge and the back surface is movable to a first position outside of the perimeter to unlock the link to remove the panel from the back surface and in a second configuration the shim is located inside the perimeter where the link is locked to prevent removal of the panel.

A ceiling module and method of constructing the same, the ceiling module mountable on a suspended ceiling grid structure and including a plurality of elongate blade members, at least a part of faces of at least two blade members being substantially mutually opposed, at least one elongate cross member extending at least between at least two blade members such that the plurality of blade members are connected to form an arrangement; and at least one support member, releasably engageable with the suspended grid ceiling structure and associated with at least one of the blade members to support the plurality of blade members from the suspended ceiling grid structure.

Light fixture embodiments for direct downlighting applications provide benefits of low overall fixture profile height, increased light output, enhanced uniformity of brightness and color by use of novel edge-lit optical elements that functions simultaneously as a diffuser and direct throughput lens, as well as an outcoupling TIR light guide. The light fixture can provide low-glare ambient light or more directional wall wash, task and accent lighting. The light fixture typically comprises a 3-dimensional extruded linear support body which retains and aligns LED boards, reflectors and edge-lit optical elements, such as a diffuser or light guide. The edge-lit design enables the height of the lighting assembly body to be equivalent to or less than the height of T-bar main beams or cross tees. This is very important in applications where there is zero or little available plenum space above the ceiling grid. Embodiments are provided that comprise mounting of the light fixture into a ceiling grid using clips or mounting hardware as well as end plates without impacting the plenum requirements. Provided are typical benefits of an edge-lit light guide design including shallow depth, extended emitting area, and off axis light distributions such as asymmetric and symmetric batwing distributions particularly useful in downlighting and other lighting applications. Additionally, area dedicated to bezels or edge reflectors can greatly improve appearance due to reduced or eliminated hotspotting and bright edges to provide a fixture face with very high percentage of light emitting area. Further embodiments are included that may be surface mounted in a cove lighting arrangement or suspended hanging from a T-bar in a suspended wood panel ceiling system. Examples are also provided of the light fixture used in ceiling grid systems incorporating drywall panels.

The present disclosure generally relates to lighting assemblies, and more specifically, to a configurable modular lighting assembly for use within a ceiling grid system. The lighting assembly is easy to install and delivers lighting distributions tailored to optimally illuminate the surface ceiling panels as well as floors, walls and work surfaces below. The configurable modular ceiling grid lighting assembly comprises both standard ceiling grid components such as T-Bar, ceiling panels and suspension cables as well as novel linear support elements with integrated or removable optical assemblies and covering elements. When installed the ceiling grid lighting assembly provided further comprises ceiling panels that are held in-line, above, below or tilted relative to the existing ceiling grid plane and as such provide both aesthetically pleasing features and useful lighting distributions. Further embodiments illustrate how both appearance and lighting distributions can be controlled by selectively applying electrical power to individual light source channels.

The present disclosure generally relates to lighting modules, and more specifically, to a configurable linear lighting module for use within a suspended ceiling grid assembly. The configurable linear lighting module is easy to install and comprises a novel linear support element with internal and external support features which is provided with integrated or removable optical assemblies to deliver lighting distributions tailored to optimally illuminate the surface ceiling panels as well as floors, walls and work surfaces below. When installed within a configured ceiling grid assembly the configurable linear lighting module provides novel support features for ceiling panels to be held in-line, above, below or tilted relative to the existing ceiling grid plane. A wide range of useful lighting distributions are achieved by configuring the optical elements and LED light sources supported and aligned by the linear support element. By selectively applying electrical power to individual light source channels it is further possible to electrically control lighting distributions. As such the configurable linear lighting module provides both aesthetically pleasing features and useful lighting distributions. Furthermore, illustrated embodiments of ceiling grid assemblies comprising one or more of the configurable linear lighting modules demonstrate how both appearance and lighting distributions can be controlled to meet aesthetic and lighting design requirements.