Do you leave lights on for your dog if you go out at night?

This is something I have never done, I always leave the outside light on when I go out so I don't trip up the stairs however, I am pretty sure that dogs can see well in the dark, not as well as cats, but pretty well. Of course if your dog is getting older, and his or her eyesight is going, then I would definitely leave a light on for the dog.