Totalevaluation of LED lighting − Glare，visibility ，suitability forenvironmental lighting

Recently LED ligh しs have come to be used inoutdoor such as s しreet lightsand seourity ligh 【s．Forthose LED lights ，diffuserwas not mounted due to the energy and cost limitation ．Therefore ，discomfor し glarecaused −saving by non −uniform LED lunlinaire has become serious prGblems．In this e ∬ ay ，the backgroundof the evaluation experiments for the discomfort glare ，as w 巳llas the evttluation experiments of visibility and suitability to environmenta 】ligh ！ing are introduced，A ］so 、itisshown with the trendof theC 肥 20i5 Manchester that discomfort glareand visibbility of LED lighting are intemationally up to daしe problems ． © 2015 The Illuminating Engineering Institute of Japan. All rights reserved.