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5wLED灯一夜大概0.05度电左右。5w/h一小时耗电为0.005度电左右,电功率为0.005kw,1度=1kw/h,即W=Pt,P=0.005kw;W=Pt=0.005kw×1h=0.005kw/h。一夜10小时左右,所以5wLED灯一...