This question is a bit tricky because it's playing on the definition of "watt". Voici la ventilation:

* Watts measure power: Power is the rate at which energy is used. A 100-watt bulb *consumes* 100 watts of power every second .

* Energy is measured in joules (or kilowatt-hours): A 100-watt bulb consumes 100 joules of energy every second.

So, the answer is: A 100-watt light bulb consumes 100 watts of energy in one second .