FIELD MEASUREMENTS OF ILLUMINANCE AND LUMINANCE DISTRIBUTION

LED lighting technology has been seeing increasing use in sports facilities. LED lighting has characteristics such as a small light-emitting area and high directionality, which may cause glare. The JIS Recommendation for sports lighting provides recommended values for illuminance and uniformity as well as glare for outdoor sports facilities. However, it does not determine the recommended value for glare in gymnasiums. The purpose of this study is to reduce glare from luminaires in visual field during sports competition in gymnasiums. In this paper, measurements of light environment were carried out in eleven gymnasiums (six with LED lighting and five with HID lighting).