\\My chicks are 5 weeks and just moved into their new coop. Currently I have the heat lamp in the coop. Do you turn the light on in the winter when it's in the 20's and 30's? assuming they're grown up by then or are they acclimated and don't require it anymore. at this point we don't know the sex, although we do the guessing game. 4 easter eggers 1 golden wheaten 3 light sussex and the other 4 I can't remember. They have been such a plesent experience.