100 joules

How Much Electrical Energy In Joules Does A 100 Watt Lamp Consume In 1 Minute? So, the energy consumed is 6000 J. How many joules does a 100-watt bulb use in an hour? The joules of energy a 100-watt light bulb use per hour is 3.6 × 105 J. How much energy does a 100-watt