%0 Conference Paper
%A Michael J Siminovitch
%A Andrew Hamilton
%A Rudolph R Verderber
%A Chin Zhang
%B Annual IEEE-IAS Conference
%C Toronto, Ontario, Canada
%D 1993
%G eng
%L LBL-35256
%T Variations in Convective Venting to Increase the Efficiency of Compact Fluorescent Downlights
%1 <p>Lighting Systems Group</p>
%2 LBL-35256
%8 10/1993
%X <p>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.</p>