Unverified85% confidenceFactTime unknown
国AA级台灯的照度均匀度要求为中心与半径0.5m处照度比≤3:1，实测可用手机照度App测量灯下不同位置验证
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Unverified护眼台灯优先选国AA级照度认证（GB/T 9473-2017），中心照度≥500lux且半径30cm范围内照度≥250lux，AA级比A级的照度均匀度要求更高82% similarUnverified选购时认准国AA级照度标准（读写作业台灯），中心照度≥500lx且直径半径30cm处≥250lx，光线均匀度更好；仅标注瓦数（如9W）不代表照度达标81% similarUnverified选购护眼台灯的标准路径：先看是否达国AA级照度→验证无频闪（慢动作录屏）→确认Ra≥90→选可调色温(2700-5000K)→检查遮光角度与均匀性→最后看调光方式与自动感光等附加功能81% similar
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