Variations in Convective Venting to Increase the Efficiency of Compact Fluorescent Downlights

Date Published
10/1993
Publication Type
Conference Paper
Authors
LBL Report Number
LBL-35256
Abstract

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.

Conference Name
Annual IEEE-IAS Conference
Year of Publication
1993
Conference Location
Toronto, Ontario, Canada
Call Number
LBL-35256
Custom 1
<p>Lighting Systems Group</p>
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Research Areas
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