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Author Preciado, O.; Manzano, E.
Title Spectral characteristics of road surfaces and eye transmittance: Effects on energy efficiency of road lighting at mesopic levels Type Journal Article
Year 2017 Publication Lighting Research & Technology Abbreviated Journal Lighting Research & Technology
Volume Issue Pages 147715351771822
Keywords Vision; Lighting
Abstract In 2010, the CIE published a recommended system for mesopic photometry based on visual performance. According to this system, scenes illuminated at mesopic levels with light sources of high S/P ratio, will produce better visual performance than those illuminated with light sources of a lower S/P ratio at equal photopic luminance. However, there could be other factors affected by SPD that, when quantified, could lead to a contradictory final effect. The scope of this paper was to evaluate how road lighting is affected by the spectral road surface reflectance and by the human eye transmittance as people get older. Our results suggest that the benefits of considering the mesopic vision effect for light sources with high S/P ratios are totally counteracted by the other two effects at mesopic luminances between 0.75 cd/m2 and 1.73 cd/m2 for people between 20 and 60 years of age, depending on the light source and the age of observers.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 1477-1535 ISBN Medium
Area (up) Expedition Conference
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Call Number GFZ @ kyba @ Serial 1862
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