How many hours does a 40 Watt lamp use one degree of electricity?
twenty-five
How long does a 36 volt 40 watt bulb last?
1 kwh = 1000 W · H
1000 W · H / 40 W = 25 H
ok
How long does a 40 Watt lamp last
The 40 Watt lamp is 25 hours per kilowatt hour, 1000W is 1 degree per hour, 100W is 1 degree per hour, 40W is 25 hours divided by 1000 divided by 40