We use the 250w bulb for heating, no problem. But we also have regular white lighting that we turn on in the evenings when we are out there visiting before they go to bed. Typically, we say goodnight and turn the white lighting off. They all meander over to the red light and get settled in for night-night. Now, my husband has heard that if you leave the white lights on 24/7 that the babies will eat all the time and grow faster! I don't like this idea at all. I think they need sleep time to grow and be healthy. I don't think it's good for them to be up 24/7 eating to make them grow faster! However, I'm a novice. We have 25 rare breed chicks who are about 6 weeks old. What do you think???