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明的特点，按cie 或iesna 的要求，路灯的光度分布类型分为3～5种，分别对应各种安装和使用场合，led 路灯及模块按此光学要求进行设计，利用光通量线方法，根据路面的亮度系数逆
http://blog.alighting.cn/169550/archive/2014/3/19/349432.html2014/3/19 15:41:36
