x2 to this ^. Have you looked at ceramic heat emitters? When I had my animals in tanks, before my addiction really set in and I switched to tubs and racks, I used those (heat emitters) in lieu of bulbs/lamps. They lasted longer than bulbs, seemed to be more consistent in their heat with less fluctuation and while they were a little more expensive, they also did emit light and disrupt the photo periods for my animals. Just a thought, otherwise it will all depend on how cool the room is.