how many joules of energy does a 100-watt light bulb use per hour?? May 2, 2022 by Anirban Share via: Facebook Twitter LinkedIn Mix More How much electrical energy in joules does a 100 watt lamp consume : The joules of energy a 100-watt light bulb use per hour is 3.6 × 105 J. Calculate the units of energy consumed by 100W electric bulb in 5 hours, Share via: Facebook Twitter LinkedIn Mix More