The subjective response to linear fluorescent direct/indirect lighting systems

K. W. Houser, D. K. Tiller, C. A. Bernecker, R. G. Mistrick

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


This paper characterizes human subjective response to spatial distributions of light resulting from different uplight/downlight photometric distributions. An array of pendant-mounted linear fluorescent luminaires illuminated a 12.7×7.2 m room. Eleven light settings were established at constant horizontal illuminance, which differed in the percentage horizontal illuminance contribution from the uplight and downlight components. Two studies are reported where subjects evaluated the light settings using psychophysical assessments; the first study utilized paired comparisons and the second utilized semantic differential scaling. Findings include: 1) the walls and the ceiling contributed to the perception of overall brightness when the work plane illuminance was held constant, 2) the room appeared more spacious when more light was supplied indirectly, and 3) light settings where the indirect component had a horizontal illuminance contribution of 60% or more were favoured.

Original languageEnglish (US)
Pages (from-to)243-260
Number of pages18
JournalLighting Research & Technology
Issue number3
StatePublished - Sep 2002

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


Dive into the research topics of 'The subjective response to linear fluorescent direct/indirect lighting systems'. Together they form a unique fingerprint.

Cite this