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

Publication Type

Conference Paper

Date Published

10/1993

LBNL 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