THE DEVELOPMENT OF EVALUATION FOR DISCOMFORT GLARE IN LED LIGHTING OF INDOOR WORK PLACE: THE MODIFICATION OF G-CLASSIFICATION USING LUMINANCE DISTRIBUTION OF LUMINOUS PARTS

摘要

It is one of the important factors of designing comfort lighting space to limit discomfort glare of indoor work place. In Japan, G-classification is used as a method of evaluating the discomfort glare of lumi-naires. The classification represents the degree of limiting discomfort glare of luminaires. It is not sure if the classification can classify the LED luminaires that has non-uniform luminance distributions because the classification is evaluated by the average luminance of luminous part. We conducted the experiment to clarify this problem. The result of the experiment shows that the classification is difficult to evaluate the LED luminaires. Even if the luminaires were classified in the same G-classification, the data of subjective evaluation were varied widely. We suggested the new G-classification modified by luminance distribution, and show the possibility that the new classification can be applied for estimating the luminaires including the LED appropriately.