Impact of New Light Pollution Regulations on Outdoor Lighting

Impact of New Light Pollution Regulations on Outdoor Lighting

The regulations target light spill, not visibility. After the city lighting management guidelines tightened, I noticed clients frequently asking: "Can signs still be lit?" From an implementation perspective, the rules focus on light spill: excess light hitting residential windows, dynamic displays that don't turn off late at night, and uplighting far exceeding surrounding ambient levels.

约束的是溢散光,不是识别度

城市照明管理口径趋严之后,我留意到甲方问得密集的一句话是"招牌还能不能亮"。从落地端看,规范指向的是溢散光:灯具射向住宅窗面的多余光、深夜不熄的动态画面、远超周边照度基线的投光亮度。牌体该有的夜间识别度没有被否定,被约束的是无节制的投光与整夜常亮。这一层区分清楚了,方案才有改的方向。

楼体亮化:轮廓灯要讲控光

配图一为一栋办公楼的夜景实拍,白色线条灯沿两条竖向轮廓与檐口勾边,中部窗带用暖黄光做分层照明,楼顶是发光字标识,裙房位置还有一条红色屏体。这类做法的要点在控光:线条灯出光角对着墙面收,不朝街道抛;洗墙灯加挡光板与遮光罩;屏体按傍晚与深夜分回路降档。同一套功率从傍晚跑到凌晨,是投诉的常见来源。

门头与发光字:亮度匹配环境

配图二为另一处夜间实拍,楼体外立面格栅后排布红色发光字,底商门头以黄色立体字与灯箱为主。居住底商与商场外街的照度基线不同,字壳内模组排布密度、亚克力透光率决定实际出光量。我们通常把夜间通电实拍列为方案确认的一环,看的是相邻窗面的光溢出情况,而不是站在三米外看字亮不亮。

回路与时序:把控制做进配电

控光这件事,落到末端还是回到回路。行业里比较稳妥的做法是傍晚、夜间、深夜三段分回路,深夜段只保留标识主体照明,装饰性轮廓与屏体断电或降亮;开关电源就近布置并留检修口,调光模块写定时序。色温也属于控光范畴,居住区一侧建议避开高色温偏蓝的光源,暖白光在同等亮度下溢散感更低。动态画面同理,滚动帧率与停留时长要压到能读清字为止,不必靠亮度抢注意力。

整改顺序:先测后换

既有项目的处置顺序,通行做法是现场照度与亮度记录、灯具角度复核、加装遮光与挡角构件、分回路或调光电源替换、屏体限时关闭。角度改不动的靠构件补,功率降不下的靠回路补,比整体拆换经济,也不影响白天的识别效果。

本地适配

重庆夏季夜间开窗时间长,楼体与门头灯光对住宅的影响比北方城市直接。合川标识标牌项目里,靠住宅一侧的牌体建议预留调光与分时关闭条件,户外广告设施的电气与封胶同时纳入雨季前检查,避免整改一次、故障两次。



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Yu ICP Be 18012268 No. -2