Road Luminaire’ Mesoptic Luminous Efficiency Analysis
Four kinds of traffic lighting sources HPS, MH, LED and EDL are widely used in roads and tunnels, the luminance at this place almost in the range of 1-10 cd/m2, which is the mesoptic vision. The mesoptic luminous efficiency can be calculated from photopic vision spectral luminous efficiency function. The results indicate that HPS’s luminous efficiency increased with improve of adaptation brightness, while the rest three kinds of light sources’ luminous efficiency reduced. At the same luminance level, HPS, MH, LED and EDL’s mesoptic luminous efficiency reduced in turn.
Dongye Sun, Wen-Pei Sung and Ran Chen
K. Huang et al., "Road Luminaire’ Mesoptic Luminous Efficiency Analysis", Applied Mechanics and Materials, Vols. 71-78, pp. 4918-4922, 2011