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

I do not usually leave the light on for the dog when he is inside, unless it is winter and I'm leaving it on for us. Now that it is summer he is outside most of the time, but in winter when it's colder he stays inside. He is crated when we are away and when we are sleeping, so the light on or off doesn't bother him. We do have a yard light we occasionally leave on, but I have noticed the dogs bark at the cats more during the night if they can see them roaming around.