Psychological Evaluation of Lighting with a Wide Range of Color Temperatures and Illuiminances
This study examined psychological impression of lighting with a wide range of color temperatures and illuminances. The experiment was carried out using a scaled mode box. The correlated color temperature(Tc) of the lighting was set to one of the following values; 2000, 2300, 2700, 5000 and 8000 K. The illuminance at the center of the floor was set to one of the following values; 10, 30, 100, 300 and 1000 lx. The total number of lighting conditions was 25 ( 5 correlated color temperatures and 5 illuminance levels). Five subjects participated in the experiment. They observed the inside of the model box and evaluated their psychological impressions: bright-dark, active-calm, comfortable-uncomfortable, clear-vague, cheerful-quiet, soft-hard, relaxed-tense, warm-cool, sleepy-stimulative, small-large, like-dislike. It was shown that the evaluation items were classified into three groups. First, the evaluation items such as bright-dark, cheerful-quiet were strongly affected by the illuminance level. High illuminance produced bright impression. Secondly, the items such as relaxed-tense, sleepy-stimulative were influenced both by the correlated color temperature and the illuminance level. High color temperature and high illuminance gave stimulative impression. Thirdly, the item warm-cool was clearly determined by the correlated color temperature. High color temperature gave warm impression. It was also shown that the lighting even with very low color temperature 2000K evaluated as comfortable at higher illuminance level. The results of the present study are useful for developing and considering new type light sources with very low or high correlated color temperature.
visual impression of lighting color temperature illuminance
ISHIDA, Taiichiro IKEYAMA, Kunihiko TODA, Naohiro
Department of Architecture and Architectural Engineering, Kyoto University Matsushita Electric Works, Ltd
国际会议
26th Session of the CIE(国际照明委员会（CIE）第26届大会)
北京
英文
204-207
2007-07-04（万方平台首次上网日期，不代表论文的发表时间）