MLO and TXMARSHMONKEY are both correct, that deer do not need extra moon light to aid them at night for whatever reason.
A whitetail deer posesses a (tapetum lucidum) which is a reflective layer inside the retina that increases the amount of light that each photosensitive cell percieves. Allowing the animal to see better under low light conditions.
This is very prevalent and essential, especially in predatory animals that require the darkness of night to hunt prey.
Has anyone ever noticed when you shine a flashlight at a cat when its in the dark, his eyes glow? Or when you drive down the road at night, you will see a deer's eyes glowing when the headlights of your car hit it? You can see this in alot of animals, especially predators, coons, foxes, coyotes, ect. This is actually the (tapetum lucidum) that you see reflecting the light (magnifying it)
But.....Have you ever been driving at night time and a(person) is walking down the road and you didn't see them until the last minute? Did you notice that his/ her eyes didn't glow? This is because a human being lacks the (tapetum lucidum)
Just another interesting thing about the whitetail deer.