Photopic Luminance Does Not Always Predict Perceived Room Brightness
Publication Type
Journal Article
Date Published
03/1990
Authors
DOI
Abstract
The perception of room brightness over photopic luminances ranging from 30 cd/m2 to 67 cd/m2 was judged by 12 subjects in an almost uniformly white experimental chamber. Two different illuminants were compared which had different spectral compositions, but were color matched. Brightness judgements were often opposite to large differences in photopic luminance. These results are inconsistent with models of brightness perception that depend solely on cone receptors. At the luminance levels considered here subjective evaluation of light intensity depends upon both photopic and scotopic spectral contributions. These results imply that aspects of the visual system operate mesopically under most interior lighting conditions.
Journal
Lighting Research and Technology
Volume
22
Year of Publication
1988
Issue
1
Organization
Building Technologies Department, Building Technology and Urban Systems Division, Electronics, Lighting and Networks