Abstract: A light fixture for housing LED units is provided. The light fixture has a housing that has a substantially H-shaped cross section. The housing has a crossbar with a series of mesas defined on its upper surface. A group of LED units is attached to each of the series of mesas, each LED unit being attached with a thin layer of adhesive. The LED units are electrically insulated from the housing by either the adhesive, which may be electrically insulating, or by an electrically insulating coating on the housing.

Abstract: A system for cleaning air in a vehicle by ultraviolet light includes an exposure chamber for exposure of air to ultraviolet light. An ultraviolet light source is mounted in the exposure chamber. A collection plenum chamber is connected to a first end of the exposure chamber. An air valve is connected to the collection plenum chamber. An expansion plenum chamber is connected to a second end of the exposure chamber including passages for distribution of air to the exposure chamber. An inlet conduit connected to the expansion plenum chamber directs air to the expansion plenum chamber. The system reliably cleans air and may be packaged so as to be integrated into existing vehicle structures, such as a passenger service unit of an airplane.

Abstract: An LED reading light assembly has an optical assembly, a power circuit board, a housing, and a control system. The optical assembly includes a holographic lens and an LED assembly comprising an LED circuit board and a plurality of LED's disposed on the outward facing side of the LED circuit board. The power circuit board provides a constant source of electric current to power the LED's. The housing includes a housing plate disposed behind the LED circuit board and a black anodized fin plate. The control system includes a temperature protection circuit monitoring the ambient temperature at the LED assembly during operation and adjusting the power supplied to the LED's to maintain the ambient temperature within a selected temperature range.