Fact 1: Some light bulbs convert electricity into light and heat energy.

Fact 2: Since the purpose of a light bulb is to generate light, the heat is wasted energy.

Given the two facts above, answer the question "What type of energy generated by the bulbs is wasted?" with the following options: 
- warmth
 - stored
 - motion
 - light
 - oil
 - heat
 - sugar
 - mostly


 

      heat   