We are building our coop and live in Michigan. We are placing one roost in front of a south window so they can sunbathe in colder months. I read it is supposed to be on their upper body however the window we have w/in the space we have is going to land it starting 7" below the roost up to 25" above their roost. Is that a problem for any reason (for ex: too cold)? If it is we could purchase a different window and use this window in another place. If not, I would like to use this window to bring more light into the coop. Any advice?