8w节能灯相当于普通灯多少瓦，怎样算的

led灯7瓦相当于普通灯泡21瓦，因为1Wled对于3W普通灯泡的瓦数。 1W LED=3W CFL(节能灯)=15W白炽灯 3W LED=8W CFL(节能灯)=25W白炽灯 4W LED=11W CFL(节能灯)=40W白炽灯 7W LED=14W CFL(节能灯)=65W白炽灯 8W LED=15W CFL(节能灯)=75W白炽灯 12W LED=20W CFL(节能灯)=100W白炽灯

节能灯18w相当于led灯管2瓦 1W LED=3W CFL(节能灯)=15W白炽灯 3W LED=8W CFL(节能灯)=25W白炽灯 4W LED=11W CFL(节能灯)=40W白炽灯 8W LED=15W CFL(节能灯)=75W白炽灯 12W LED=20W CFL(节能灯)=100W白炽灯

led灯7瓦相当于普通灯泡21瓦，因为1Wled对于3W普通灯泡的瓦数。 1W LED=3W CFL(节能灯)=15W白炽灯 3W LED=8W CFL(节能灯)=25W白炽灯 4W LED=11W CFL(节能灯)=40W白炽灯 7W LED=14W CFL(节能灯)=65W白炽灯 8W LED=15W CFL(节能灯)=75W白炽灯 12W LED=20W CFL(节能灯)=100W白炽灯

led灯14瓦相当于普通灯泡21瓦 1W LED=3W  CFL(节能灯）=15W白炽灯  3W LED=8W  CFL(节能灯）=25W白炽灯  4W LED=11W  CFL(节能灯）=40W白炽灯  8W LED=15W  CFL(节能灯）=75W白炽灯  12W LED=20W CFL(节能灯）=100W白炽灯