Impact of Nighttime Lighting Regulations on Signage Illumination

Impact of Nighttime Lighting Regulations on Signage Illumination

Since autumn began, several commercial streets in Chongqing have tightened nighttime lighting controls. Restrictions on brightness during late hours and mandatory dimming are now included in the management guidelines. After years of designing signage, I've never felt before that the design freedom for illuminated letters and lightboxes is being redefined by the night. The image shows a bank entrance at night, green...

入秋以后,重庆好几条商业街把夜间灯光管控又收紧了一档,深夜时段限亮、强制减光都写进了管理细则。做招牌这么多年,我第一次感觉到,发光字和灯箱的设计自由度,正在被夜色重新划定边界。

图中是夜间的银行门头,绿底招牌上的发光字全部点亮,中英文字面在暗背景里看得清清楚楚。这类银行门头的字光源均匀、不闪不停,是管控里被默认保留的样子。被限制的是高亮度、大面积、频繁跳变的屏和字,管理方向是区分好坏,而不是一刀切熄。

我们接的单子已经跟着变了做法:发光字改用带调光端子的电源,装定时器,夜里十一点后自动降到一半亮度;灯箱降低灯珠密度,换柔和灯罩;门头喷绘、紫外平板这类不发光的做法,反而被老街的店主们重新看重起来。做法在变,报价单也跟着变,带调光功能的电源每套贵几十块,店主们如今都愿意掏这笔钱。

另一张图是乡镇墙面上的广告,绿底白字,白天不发光。在县域和乡镇场景,这类墙体喷绘和导视牌基本不涉及夜间光污染,管控压力小得多。对门面正对居民楼的店主,我最近都劝他们少做通体亮的大灯箱,多做轮廓光和局部照明,省电也省投诉。

店主们的顾虑很具体:灯一暗,客人还找不找得到门。我们给南岸一家火锅店实测过,减光前门头照度三十多勒克斯,减光后只剩十来勒克斯,但侧返字的轮廓光依然把入口勾得很清楚。数据拿给店主看,他当场拍板换调光电源。恐惧来自未知,把数字摆出来,办法就清楚了。

当然,也有交学费的时候。上月一家餐馆翻新门头,原本方案是通体大字,一比对管控要求就慌了,怕夜里减光后没了存在感。我们最后用侧返发光字加局部灯箱,靠光晕衬墙面,既过了亮度线,夜里又是整条街最耐看的一张脸面。

还想提醒一句灯箱的事。不少门头的灯箱灯珠已经老化发暗,定时器却还整晚按满功率走,亮度没保住,电也没省下。我们巡检时先测电流,该换光源换光源,面板黄了就换面板,钱花得不多,观感和达标都立竿见影。夜间管控不是逼大家熄牌,而是逼大家把牌亮对。

管控会越来越细:商业大街一个标准,居民路段一个标准,节假日和平日两个时段。对我们来说,把亮度分级和定时控制提前做进施工方案,是眼下最实在的应对。招牌是为了被看见,但看得舒服,才允许你一直亮着。

(正文计802字)



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Yu ICP Be 18012268 No. -2