THE INFLUENCE OF ELAPSED TIME AND ILLUMINANCE/COLOR TEMPERATURE ON THE SUBJECTIVE EVALUATION OF INTERIOR LIGHTING

摘要

The illuminance and color temperature of a light source affect the perceived impression of interior lighting. People generally prefer a low color temperature (i.e., warm colors) in interior spaces with low illuminance, and a high color temperature, (i.e., cool colors) in interior spaces with high illuminance. This phenomenon is expressed by the Kruithof curve, which describes the relation between the illuminance and color temperature of a light source. However, there are issues with the Kruithof curve. Therefore, the aim of the present study was to clarify the influence of elapsed time on the subjective evaluation of interior lighting. Two different scale models were used in this study. Each subject is assumed the activity of relaxing in the living room and evaluates orally in this experiment. The results show the perception of comfort with regard to the interior space tended to increase with elapsed time.