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

Fact 2: Black numbers on a white background are easier to see in darkness or bright light.

Given the two facts above, answer the question "Bulbs produce electrical energy to what?" with the following options: 
- reproduce
 - Change colors
 - rain or sun shine
 - adding heat
 - look at the sun
 - power up cars
 - see in darkness
 - walk through yards


 

       see in darkness  