The new hens I have I know have to get used to my place here. But one thing I think I need some help with. When it comes time to go to roost it seems the inside of the coop is darker than the outside. Not all but a few of the chickens don't want to go in. I put a flashlight in one of the windows so it really brightens up inside and they all go in. I don't have electricity to the coop and the flashlight thing is going to get old. Could the inside be to dark for them to see? The door that I made to clean out the insides of the coop is a 31X36 inch window. I thought that would have put plenty of light in there. What's my problem here?