Fact 1: An incandescent light bulb converts electricity into light by sending electricity through a filament.

Fact 2: Additional electricity is stored in the battery.

Given the two facts above, answer the question "What can convert battery energy into light?" with the following options: 
- incandescent light bulbs
 - motors
 - focusing a lens
 - an electron lens
 - generators
 - speakers
 - hydrogen and oxygen
 - Firecrackers


 

 incandescent light bulbs        