Secondary Author(s)

Schrum, Lynn; Sonne, Jeffrey; Stedman, Ted

Report Number




Buildings; Cooling


Lighting systems in commercial office buildings are primary determinants of building energy use. In warmer climates, lighting energy use has important implications for building cooling loads as well as those directly associated with illumination tasks. To research the comparative performance of conventional and advanced office lighting systems, Florida Solar Energy Center (FSEC) set up the Lighting Flexible Test Facility (LFTF) which allows side-by-side comparison of lighting options in two otherwise identical 2.7 m x 3.7 m (9' x 12') south facing offices.

The ceiling of the LFTF contains 0.61 m x 1.2 m (2' x 4') recessed fluorescent fixtures designed to be easily changed. Differing lighting systems were comparatively tested against each other over week-long periods. Data on power consumption (watts), power quality (power factor), work-plane interior lighting levels (lux), bulb-wall, fixture and plenum temperatures were recorded every 15 minutes on a multi-channel data logger. This data allows realistic analysis of comparative lighting system performance including interactions with daylighting.

Date Published



Reference Publication: Parker, D., Schrum, L., Sonne, J., Stedman, T., "Side­-by-Side Testing of Commercial Office Lighting Systems: Two-lamp Fluorescent Fixtures," Presented at the Tenth Symposium on Improving Building Systems in Hot and Humid Climates, Texas A & M University, Fort Worth, TX, May 13­14, 1996.

Local Subjects

Buildings - Cooling


FSEC Energy Research Center® Collection



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In Copyright