Unverified90% confidenceFactTime unknown
LED灯具的光通量（流明lm）才代表亮度，瓦数（W）只代表耗电，同亮度下LED约为白炽灯功率的1/8；选购看lm而非W，效能好的LED约100-120lm/W
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Unverified光效指标看流明每瓦(lm/W)而非单看功率：优质LED灯泡≥90lm/W，9W可达800流明以上，替代传统60W白炽灯；只标功率不标流明的产品需警惕虚标92% similarUnverified亮度看流明(lm)不看瓦数：LED约100-120lm/W，替换传统60W白炽灯选约800lm的LED（约8-9W），40W白炽灯约450lm对应5W LED90% similarUnverifiedLED灯泡实际亮度看流明(lm)而非瓦数，替换60W白炽灯需约800lm(约8-10W LED)，替换100W需约1600lm(约14-16W LED)，光效达标的LED应≥100lm/W89% similarUnverified看流明而非瓦数选灯，LED光效差异大：劣质灯80lm/W，优质灯120lm/W以上，同样30W实际亮度可差50%88% similarUnverified全光谱灯泡的流明效率普遍低于普通LED（约70-90lm/W vs 100-130lm/W），替换普通灯泡时需按流明选而非按瓦数，否则会明显偏暗86% similar
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