Because their bodies can't heat themselves and they need heat, so the light provides heat. Plus, I think your geckos would like to see their surroundings better.
Because their habitat is diffrent in the desert than a cage
no it doesnt...it takes place in thoer places in the body.
Yes, certain areas do report the existence of cannibal tribes. One such area is island of New Guinea, an island that sits just north of the Australian continent.
They walk up and smell you and then rest thoer head on your shoulder. They also won't try to buck you of as often as a horse that does not like you.