Abstract
To clarify importance of personal adjustments with office lighting, authors interviewed 17 general office workers and 38 experts in lighting industry. We also conducted the experiments to quantify the effect that having the ability to change the illumination level themselves had on the workers' satisfaction and to distinguish between the effect resulting from “Control” and one from the change itself.
The interviews showed that both the general office workers and the lighting designers perceived lighting adjustments as a key factor, while importance of the adjustment was not recognized so much. The experiments showed that evaluations of the luminous environment differed greatly depending on whether the evaluator was able to adjust the lighting level, while both the effect resulting from “Control” and one from the change in illumination level were slight.
