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.
BT - Lighting Research and Technology C1 -Lighting Systems Group
C2 - LBL-25174 DA - 03/1990 DO - 10.1177/096032719002200103 IS - 1 LA - eng M1 - 1 N2 -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.
PY - 1988 SP - 37 EP - 41 T2 - Lighting Research and Technology TI - Photopic Luminance Does Not Always Predict Perceived Room Brightness VL - 22 ER -