In most compact fluorescent recessed downlights, hot air stratifies within the fixture, causing the lamps to overheat and lose up to 25% of light output and efficacy. Thermal management techniques, including passive venting of the fixture, are being developed to mitigate these losses in fixture efficiency. This paper demonstrates a sequence of venting configurations and techniques, from an unmodified compact fluorescent downlight as a control fixture, through a series of venting strategies, to the development of a highly efficientsdownlight that incorporates a new angular concept in convective venting. With this new venting design, an increase in light output of nearly 25% can be attained without the optical losses generally associated with some venting geometries.
BT - Annual IEEE-IAS Conference C1 -Lighting Systems Group
C2 - LBL-35256 CN - LBL-35256 CY - Toronto, Ontario, Canada DA - 10/1993 LA - eng N2 -In most compact fluorescent recessed downlights, hot air stratifies within the fixture, causing the lamps to overheat and lose up to 25% of light output and efficacy. Thermal management techniques, including passive venting of the fixture, are being developed to mitigate these losses in fixture efficiency. This paper demonstrates a sequence of venting configurations and techniques, from an unmodified compact fluorescent downlight as a control fixture, through a series of venting strategies, to the development of a highly efficientsdownlight that incorporates a new angular concept in convective venting. With this new venting design, an increase in light output of nearly 25% can be attained without the optical losses generally associated with some venting geometries.
PP - Toronto, Ontario, Canada PY - 1993 T2 - Annual IEEE-IAS Conference T3 - Annual IEEE-IAS Conference TI - Variations in Convective Venting to Increase the Efficiency of Compact Fluorescent Downlights ER -