露天堆场照明难在两处：一是面积大、立柱少，投光灯够不到中间；二是粉尘水汽重，灯具半年就发黑、光通量腰斩。
堆场一般作业面 20-50lx、装卸区不低于 50lx（参照 GB50034 室外作业场地），灯具 IP66、防腐等级 WF2，抗风等级需匹配当地基本风压，眩光控制避免影响场外道路。
曦韵用『少灯杆、大功率、精准配光』的方式做主堆场泛光，配合灯具防尘自清洁涂层，把清洗周期从半年拉长到两年，全周期成本反而更低。
Outdoor yards are hard on two counts: vast areas with few masts leave middles unlit, and dust plus moisture blacken luminaires within months, halving output.
General yard 20-50 lx, handling zones >=50 lx (per GB50034 outdoor areas), IP66 and WF2 corrosion class, wind rating matched to local basic wind pressure, glare controlled to spare adjacent roads.
Xiyun floods main yards with fewer, higher-output poles and precision optics; dust-shedding coatings stretch cleaning cycles from half a year to two, lowering total cost.
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