Abstract

Controlled environment light fixture configurations include an LED light source (111). The light fixtures (2) can be installed and removed from below the ceiling (4). The light fixture (2) can be installed and removed without opening the lens frame (8) of the light fixture (2). The light fixture (2) includes a sealed housing (6) and seals to the ceiling (4) when installed. The light fixtures (2) are provided in exterior dimension sizes that allow the fixtures to be installed in a variety of controlled environment ceilings in recessed configurations. The lower surface exposed to the controlled environment is free of welds and grinds in order to provide a corrosion resistant surface.

IPC Classes  ?

• F21V 31/00 - Gas-tight or water-tight arrangements
• F21V 29/507 - Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
• F21V 29/74 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
• F21K 9/00 - Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• F21S 8/02 - Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
• F21V 5/08 - Refractors for light sources producing an asymmetric light distribution
• F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
• F21V 15/01 - Housings, e.g. material or assembling of housing parts
• F21V 17/12 - Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
• F21V 21/04 - Recessed bases
• F21V 23/00 - Arrangement of electric circuit elements in or on lighting devices