Unverified80% confidenceFactTime unknown
红外报警器夜间感应能力其实优于白天，因为夜晚人体与环境温差更大更易识别；但强逆光/热源（篝火）附近会失灵，布置应避开火堆方向
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80%
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Long-term
Relevance
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Unverified带光敏感应（环境暗才亮灯）的款式白天不误触发更省电，夜间起夜/衣柜场景优先选PIR人体感应+光敏双感应的组合款81% similarUnverified感应式（人体/雷达感应）氛围灯适合起夜场景，选带光感联动的款式可白天不亮仅夜间感应点亮，纯人体感应无光感会白天误触发80% similarUnverified人体感应（PIR红外）灯只对移动的热源敏感，静止不动会熄灭，久坐场景（书桌、床头阅读）应选择微波雷达感应或手动开关款79% similarUnverified烟雾信号为白天使用的视觉求救手段，夜间几乎无效，夜间场景需搭配火焰信号或电子闪光信号使用79% similarUnverified光敏感应（光控）只解决'天黑常亮'需求会整夜耗电，人体感应更省电但存在无动作即熄灭的问题；理想方案是'光控+人体'双感应：白天不亮、夜间有人才亮77% similar
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