My chicks are 4 weeks old and sooo ready to get out of their brooder! This is my 2nd batch of chicks, but my 1st time raising them in the Fall. And now that they are ready to go outside, it is suddenly getting chilly in Georgia. So, I'm thinking of possibly using their heat lamp in their grown up coop outside if need be. During the day the temps are going to be in the high 60's to low 70's, but at night, they will be mid 40's. They are all winter hardy breeds, so I don't want to use the heat lamp for longer than I have to. They will have a run to play in during the day and I will close them up in their coop at night, of course. I only want to turn the heat lamp on at night with a timer. So my question is; will they be okay to move outside, or should they wait a bit longer?