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Proceedings Paper

The mesopic effect of different correlated color temperature LED light sources on road lighting
Author(s): Xuan Li; Shangzhong Jin; Yanhua Wang; Songyuan Cen; Pei Liang; Le Wang; Xiaoyan Li
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Paper Abstract

The theory of mesopic vision provides an important theoretical foundation for the choice of road lighting sources. Based upon a number of recent mesopic photometry studies, an equation (Emes = BEP) to deduce from the Ep (photopic illumination) to Emes (mesopic equivalent illumination) is proposed, where B is instant for modified coefficient. The coefficient B can be used easily to calculate the mesopic equivalent illumination by using the measuring results of photopic illumination for different correlated color temperature (CCT) light sources under mesopic light levels. Using the equation, we analyze the variation of coefficient B with background lighting level of the different correlated color temperature lighting sources under mesopic vision levels. By calculating the mesopic equivalent illumination of the different sources, our results showing that the higher correlated color temperature LED sources have better visual effects. Moreover, the results provide a basis for further studies on the illuminometer, which might be suitable for mesopic vision.

Paper Details

Date Published: 11 January 2011
PDF: 6 pages
Proc. SPIE 7991, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy II, 799106 (11 January 2011); doi: 10.1117/12.888527
Show Author Affiliations
Xuan Li, China Jiliang Univ. (China)
Shangzhong Jin, China Jiliang Univ. (China)
Yanhua Wang, China Jiliang Univ. (China)
Songyuan Cen, China Jiliang Univ. (China)
Pei Liang, China Jiliang Univ. (China)
Le Wang, China Jiliang Univ. (China)
Zhejiang Univ. (China)
Xiaoyan Li, China Jiliang Univ. (China)
Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 7991:
Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy II
Heonsu Jeon; Min Gu; Yi Luo; Chih-Chung Yang; Muqing Liu, Editor(s)

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