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Unverified88% confidenceDecision RuleTime unknown

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

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Unverified国AA级照度标准要求：中心照度Ea≥500lux，且距中心半径0.5m范围内照度均匀，是目前读写台灯照度的最高国家等级87% similar Unverified国AA级照明标准要求中心区域照度≥500lux、直径30cm半圆内均匀度≥0.7、直径50cm内≥0.5，是读写台灯照度均匀性的最高等级87% similar 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86% similar Unverified国家标准中，读写作业台灯AA级要求灯具中心照度≥500lx，AA级半径50cm处照度≥250lx，是护眼灯的硬指标86% similar

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