Conspicuity and Glare Properties of Daytime Running Lights: Effects of LampSeparation and Intensity

摘要

This study evaluated the influences of lamp separation and lamp intensity on theeffectiveness of daytime running lights. Subjects performed two tasks. They rated discomfort glare from a pair of lamps, and evaluated the conspicuity of the same lamps. The same nine stimuli were obtained by tghe orthogonal combination of three levels of luminous intensity directed towards the subject's eyes from the two lamps (14,000, 2,500, and 875 cd), and three levels of lamp separation (1.05, 0.65, and 0.25 m--edge to edge). The study was performed outdoors, on bright, sunny days. The viewing distance was 20 m.