I have a coop ready for when they can go outside I've just been waiting on feathers and weather (its been raining a lot and night time temps are in the low 40's, everything I have been reading is that its optimal for nights to be 50 or above. Unless they are training me for the 'good life' instead of me training them !!)
If they are under a lighted heat lamp and freak out when you turn it off it may be due to the change in light. I use non light emitting ones because I like my chicks to sleep at night. They always pitch a fit when I turn out the regular light. Most animals are creatures of habit and chickens are no different.
If they haven't been out at all.. it's nice to bring a dish of dirt in so they get some exposure to the stuff in the soil before going out full time. Or they can go out, when it's dry for a couple hours during the afternoon. They should be good at your temps. My temps are about the same and that's how I do it year round.

Are they roosting inside at night or still in a pile? What is your house temp? Turn that night time heat off so they can start adjusting. They will gripe and then they will settle down and sleep.
