Fact 1: Alight bulb requires electrical energy to produce light.

Fact 2: Energy-saving light bulbs are essentially fluorescent light bulbs.

Given the two facts above, answer the question "Energy-saving is important when electrical energy is used to produce what" with the following options: 
- sound
 - a stove
 - crops
 - light
 - oil
 - motion
 - Heat
 - waves


 

    light     