Fact 1: Alight bulb is used for seeing in the dark.

Fact 2: Just as darkness is the absence of light.

Given the two facts above, answer the question "What are used for seeing in the absence of light?" with the following options: 
- light bulbs
 - cactuses
 - satellites
 - microscope
 - photons
 - bushes
 - energy
 - focusing a lens


 

 light bulbs        