基于反应时间的道路照明功率密度确定方法

由于金卤(MH)灯和发光二极管(LED灯)作为道路照明光源时,其照明功率密度(LPD)没有标准可依,为此,选取色温为2 000 K的高压钠灯(HPS)、色温为4 800 K的MH灯和色温为7 200 K的LED灯作为照明光源。利用道路照明反应时间测试装置分别进行反应时间实验,得到道路照明亮度水平下MH灯和LED灯相对于HPS灯的亮度对比系数,确定其相对HPS灯的相对光效,并在此基础上计算得到MH灯和LED灯作为道路照明光源时的照明功率密度标准值。研究结果表明:将4 800 K的MH灯作为道路照明光源时,所需LPD为HPS灯的1.3倍左右,将7 200 K的LED灯作为道路照明光源时,所需LPD为HPS灯的47%~89%。

Determination method of road lighting power density based on reaction time

When metal halide(MH) lamps and light emitting diodes(LEDs) are used as road lighting sources,there is no existing lighting power density(LPD) standard to follow.To solve this problem,the high pressure sodium(HPS) lamps with color temperature of 2 000 K,MH lamps with color temperature of 4800 K and LEDs with color temperature of 7 200 K as light sources were selected and the reaction time tests were conducted by using independently developed instruments.The luminance contrast coefficients of MH lamps and LEDs related to HPS lamps were calculated based on the reaction time results,and their luminous efficiencies related to HPS lamps were determined,respectively.Thus,the LPD standard values of MH lamps and LEDs when used as road lighting sources are obtained.The results indicate that when MH lamps with color temperature of 4 800 K are used,its LPD reduction coefficient is about 1.3 times of that of HPA lamps.When LEDs with color temperature of 7 200 K are used,its LPD reduction coefficient related to HPS lamps ranges from 47%?89%.