Research on Glare-free Lamps Based on the Concept of Effective Luminous Flux

Abstract

The intensity of glare in Low Mounting Height Luminaires(LMHL) is positively correlated with the light output efficiency of the lamps. The light interceptor that eliminates glare will cause the light output efficiency of the lamps to be extremely low. This paper analyzes the light output of the street lamps based on the driver's visual needs, and puts forward the concept of effective luminous flux for road lighting. The street lamp light is divided into three parts: effective luminous flux, invalid luminous flux and harmful luminous flux; according to the concept of effective luminous flux, a multi-channel luminaire structure is designed to convert invalid luminous flux into effective luminous flux and eliminate harmful luminous flux. The software simulation experiment verifies the relationship between the luminous efficiency of the lamp and the number of channels, and the final sample is made to prove the feasibility of the structure. The experimental results show that the luminous efficiency of the luminaire has a linear relationship with the number of channels. It is 67%; the light output efficiency of the dual-channel sample is increased by 34% compared with the single-channel sample; the light output efficiency of the four-channel sample is increased by 92% compared to the single-channel sample. Therefore, the multi-channel luminaire structure can simultaneously solve the problems of intense glare and high energy consumption in LMHL.