I have three wk old BCMs in a brooder in the basement. They really need more room now and I don't want to keep them in the house for 8 weeks like I did last year. Their coop is like a stall in one of the barns but it is open on one end so the entrance wall is just hardware cloth. But its at least 10 ft from the outside entryway. So I want to move them in this weekend with their heatlamp to a larger brooder within the coop. My question is will the heatlamp be able to keep the temp where it needs to be if it is in the high 60's to lower 70's at night? I'm not worried about the daytime temps of 80-90s but since this coop is open on one side it's like being outside. I hope this makes sense.