Larry's right, ya'll. Once our chicks are fully feathered, they don't need the heat lamps. I haven't provided mine with any past 4-6 weeks, myself. This will be my first winter to even use the christmas lights, and that's strictly to keep up egg production. As long as you have a well secured coop and minimize cold drafts to your best ability your chicks should be absolutely safe. Of all the little ones I've added to my main flock, I've not lost one yet to the cold. Myself, I don't think I could sleep very well at night with a heat source of any kind going without supervision. Kind of like letting a candle burn somewhere in your house while in bed?? But that's just my opinion. Mostly I just try to make sure predators can't get to them. They're more likely to come to harm that way than freezing to death. We all live and learn. I know I've learned a lot from my mistakes. Everyone makes them. After all....we're only human. We can always do better next go 'round.