Abstract
It has been reported in a number of investigations that the subjective brightness of object colors is affected by changing the color rendering properties of lighting sources. However, the paucity of reports on various illuminance levels promoted us to investigate it. The subjective experiment was done for 15 test color chips under various illuminance levels covering 1280 to 1 lx. We used reference standard type cool white fluorescent lamp and six kinds test fluorescent lamps.
The results show that the subjective brightness of object colors in the photopic range is effected by the increase of light saturation on the color chips by changing the type of fluorescent tubes. it did not show any change in the mesopic range.
