Highway Tunnel Lighting Research Based on Mesopic Vision
The white LED and high-pressure sodium lamp (HPS) are used to simulate highway tunnel lighting under different background brightness (abbreviated as B) conditions, from a series of reaction time tests, the result shows that white LED can provide shorter reaction time for observers compared with HPS, further research suggests under the mesopic vision, different kinds of light sources maybe have unlike brightness, although which is identical under the photopic vision. From the luminous spectrum test and mesopic vision spectral luminous efficiency function fitting calculation, the mesopic equivalent brightness can be determined with certain light source and B value. This conclusion would provide a more accurate and lower energy consumption lighting design method for highway tunnel.
Dongye Sun, Wen-Pei Sung and Ran Chen
Y. Yang et al., "Highway Tunnel Lighting Research Based on Mesopic Vision", Applied Mechanics and Materials, Vols. 71-78, pp. 4061-4064, 2011