Quantitative relations between discomfort glare evaluation and photometric quantities such as illuminance at the observer’s eye, average luminance of the source area, average luminance of the effective area and effective glare luminance for white LED sources having a variety of spatial luminance distributions have been investigated. Effective glare luminance, which is the sum of luminances in the luminaire area divided by the effective area, explains the scaling results of all sources in the same way. In addition, a new equation modified from the Commission Internationale de l'Éclairage Unified Glare Rating formula using the effective glare luminance showed a strong correlation with the scaling results. It is thus suggested that effective glare luminance is a useful index of discomfort glare for light sources having different spatial luminance distributions.
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References
1.
ReaMS. The IESNA Lighting Handbook Reference and Application, 9th. New York: Illuminating Engineering Society of North America, 2000.
2.
MainAVlachonikolisIDowsonA. The wavelength of light causing photophobia in migraine and tension-type headache between attacks. The Journal of Head and Face Pain2000; 40: 194–199.
3.
TatsumotoMKajiyamaNEdaTKanekoMKobayashiSAyamaMHirataK. Discomfort glare from brake lamps in patients with migraine: Proceedings of the International Symposium on Automotive Lighting, Darmstadt, Germany, Sep 24–25: 2013, pp. 116–120.
4.
VosJJ. Reflections on glare. Lighting Research and Technology2003; 35: 163–176.
5.
SchreuderD. The human observer; visual perception. Outdoor Lighting: Physics, Vision and Perception, New York: Springer, 2008. pp. 273–311.
HolladayLL. The fundamentals of glare and visibility. Journal of the Optical Society of America1926; 12: 271–319.
8.
HolladayLL. Action of a light-source in the field of view in lowering visibility. Journal of the Optical Society of America1927; 14: 1–15.
9.
NuttingPG. Effects of brightness and contrast in vision. Transactions of the Illuminating Engineering Society1916; 11: 939–946.
10.
VosJJ. Glare today in historical perspective: Towards a new CIE glare observer and a new glare nomenclature: Proceedings of the CIE 24th Session, Warsaw, 1999, 1999, pp. 38–42.
11.
OsterhausWKE. Discomfort glare assessment and prevention for daylight applications in office environments. Solar Energy2005; 79: 140–158.
12.
Commission Internationale de l'Eclairage. Discomfort Glare in Interior Lighting, Vienna: CIE, 1995.
13.
Commission Internationale de l'Eclairage. Discomfort Glare in the Interior Working Environment, Vienna: CIE, 1983.
14.
Commission Internationale de l'Eclairage. CIE Collection on Glare, Vienna: CIE, 2002.
15.
IwataTTokuraM. Examination of the limitations of predicted glare sensation vote (PGSV) as a glare index for a large source: Towards a comprehensive development of discomfort evaluation. Lighting Research and Technology1998; 30: 81–88.
16.
Commission Internationale de l'Eclairage. Glare Evaluation for Use Within Outdoor Sports and Area Lighting, Vienna: CIE, 1994.
17.
Commission Internationale de l'Eclairage. Glare and Uniformity in Road Lighting Installations, Paris: CIE, 1976.
18.
Kimura-MinodaTAyamaM. Evaluation of discomfort glare from color LEDs and its correlation with individual variations in brightness sensitivity. Color Research and Application2010; 36: 286–294.
19.
BulloughJD. Luminance versus luminous intensity as a metric for discomfort glare. SAE Technical Paper2011. 2011-01-0111, 2011.
20.
BulloughJDSweater-HickcoxK. Interactions among light source luminance, illuminance and size on discomfort glare. SAE International Journal of Passenger Cars - Mechanical Systems2012; 5: 199–202.
21.
KasaharaTAizawaDIrikuraTMoriyamaTTodaMIwamotoM. Discomfort glare caused by white LED light sources. Journal of Light and Visual Environment2006; 30: 95–103.
22.
Eble-HankinsMLWatersCE. Subjective impressions of discomfort glare from sources of non-uniform luminance. Leukos2009; 6: 51–77.
23.
MatsudaSHoraguchiKYoshikawaT. Experimental studies on British IES Glare Index system. Journal of the Illuminating Engineering Institute of Japan1969; 53: 51–55. (in Japanese).
24.
de BoerJB. Visual perception in road traffic and the field of vision of the motorist. Public Lighting, Eindhoven: Philips Technical Library, 1967.
25.
HirningMCoyneSCowlingI. The use of luminance mapping in developing discomfort glare research. Journal of Light and Visual Environment2010; 34: 101–104.
26.
AkashiYMuramatsuRKanayaS. Unified glare rating (UGR) and subjective appraisal of discomfort glare. Lighting Research and Technology1996; 28: 199–206.
