Unverified80% confidenceDecision RuleTime unknown
亮度调节需支持无级/PWM高频调光（≥3000Hz以上或DC调光），低频PWM调光在低亮度下频闪明显，长期夜间使用易造成眼疲劳和头痛
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80%
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Long-term
Relevance
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Unverified真正无频闪需认准DC调光而非高频PWM调光，PWM调光频率≥3840Hz才能基本消除频闪对眼睛的影响，低于此值长时间使用易疲劳91% similarUnverified带DC调光或PWM高频调光（≥1250Hz以上或标注无频闪）的灯泡才能护眼，低价灯泡低亮度时用低频PWM，调暗后频闪明显加剧91% similarUnverified亮度调节优先选PWM高频调光（≥2000Hz）而非降压调光，低频PWM在低亮度时肉眼可见频闪，长时间伏案会加重视疲劳90% similarUnverified调光方式优先选PWM频率>3000Hz或DC直流调光的产品，低频PWM（<1250Hz）在低亮度时频闪严重，长期使用引起眼疲劳90% similarUnverified真正护眼需高频PWM调光（≥1920Hz）或原生DC调光，1920Hz以下的PWM调光在低亮度时频闪明显，敏感人群仍会眼疲劳90% similar
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