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关注PWM调光频率，低于1250Hz的低亮度调光会产生频闪，长时间使用易疲劳；优选宣称高频PWM（>3000Hz）或DC直流调光的产品，儿童房和书房尤其重要

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Unverified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92% similar UnverifiedPWM调光频率过低（＜1000Hz）的调光夜灯会产生频闪，长期使用对眼睛不友好，敏感人群应选DC调光或高频PWM（＞3000Hz）产品91% similar UnverifiedPWM调光频率过低会产生频闪，防蓝光灯带若采用低频PWM调光反而伤眼，选购调光款需确认调光频率≥3000Hz或采用DC恒流无频闪调光89% similar UnverifiedPWM调光(脉冲宽度调制)在低亮度档位时频闪风险增大，追求护眼应选DC直流调光或高频PWM(>3000Hz)的产品，纯氛围用途可放宽此要求89% similar Unverified夜灯必须采用无频闪或高频驱动电源（>3000Hz），劣质PWM调光在低亮度档位频闪明显，长期使用易造成儿童视疲劳；优先选择DC恒流调光产品88% similar

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