Unverified75% confidenceFactTime unknown
落地式或大灯头护眼灯的照射直径通常比小台灯大，能覆盖A4纸整页避免边缘明暗差，桌面大或需照亮整个书本时更适合
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75%
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Long-term
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Unverified读写台灯发光面应采用导光板或大面积漫射设计而非裸露LED灯珠，避免眩光；有效照明区直径应≥40cm覆盖整张书桌宽度85% similarUnverified发光面积大（圆形大灯头），桌面照射均匀度优于普通条形灯头台灯，适合书桌大面积阅读/书写场景84% similarUnverified发光面积大（圆形面光源），桌面照射均匀度优于普通长条灯头台灯，适合学生写作业、阅读等大面积用光场景84% similarUnverified书桌阅读优先选立式/大力钳类台灯，出光口宽度≥30cm可实现整桌面均匀照明，圆形小灯头照射范围窄易产生阴影84% similarUnverified灯头宽度和悬臂长度决定照射面积，读写用需灯头长度≥30cm、悬臂能覆盖整张书桌宽度；小灯头护眼灯照亮范围窄，边缘暗导致眼睛频繁调节疲劳84% similar
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