The light is on 24/7 but that doesn't mean their total environment needs to be 95F all the time. Let the chicks decide. We brood outside. It was 24F last night. Not a problem. They sleep under the lamp, as needed, but spend much of their time playing, eating and drinking away from the hot spot. It is natural. Chicks under a broody mother do not spend 24/7 under her, of course. They regulate themselves very well.