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

Fact 2: Light quanta are called photons.

Given the two facts above, answer the question "What requires electrical energy to produce photons?" with the following options: 
- satellites
 - an electron lens
 - cigarettes
 - an object
 - heterotrophs
 - squids
 - sensory neurons
 - a lightbulb


 

        a lightbulb 