Ill always take a light with me. I wont always use it, but if I need it, it's right there for me to use. You never know if your going to get lost, or shoot a deer in the evening and need it to find blood.
A little tip when using a light is: Keep the light to the ground. Deer wont see it as much. Also you can put tacks in the bottom of tree's and use the light to find your stand that way. People are more opt to finding a stand with tacks right in the middle of a tree than on the bottom of it.
"If I pull the hammer and shoot this young buck, he's dead. But if I pass on him, the next hunter might not shoot so straight."