Study the transmittance properties of light sources under simulated hazy condition

Abstract

With the rapid development of industrialization, pollutant from industry and automobile has a big influence on the air quality of cities. With the high humidity caused by the urban microclimate, the visibility is greatly reduced due to the hazy weather formed by the accumulation of pollutant and vapor. In this paper, a hazy simulation environment is established to measure the transmittance of LED lamps, metal halide lamps and sodium lamps. First, we studied their transmittance under the fog condition (liquid) as well as the haze condition (solid). Then, the comparison among transmittance of light sources under different hazy environment is shown. The results are useful to the road lighting design.