书城照明两难：书架区要亮到能读封底小字，但不能让顶灯的光直射成'页面反光'，翻书像照镜子。
阅读区300lx、书架垂直照度≥150lx让书脊可读（GB50034图书馆类）；书架通道灯具深藏+非直射配光；童书区3500K暖光+防眩加强，保护少儿视力。
我们的书城方案加做了'久读不累'实测：招募读者连续阅读2小时舒适度评分，优化后数据作为设计依据而非拍脑袋。
Bookstores face a dilemma: shelves bright enough to read back covers, yet no direct ceiling glare turning pages into mirrors.
Reading 300 lx, shelf verticals ≥150 lx for legible spines (GB50034 library class); deep-recessed non-direct optics in stack aisles; children's zone 3500K warm with enhanced glare protection for young eyes.
Our bookstore scheme includes a 'read-without-fatigue' study — two-hour comfort scoring with real readers — so the design rests on data, not gut feel.
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