I put some covers over the top of the brooder just, so im going out there to check that its to too hot in 30 min. I just want to be sure that they are warm enough through the night. What do you guys think? am I overkilling with two heatlamps for 16 chicks in a well insulated box in the garage on a 30 degree night? Will it harm the chicks if they aren't able to access temps above (lest arbitrarily pick) 75 for a 2 or 3 hours over night? I really doubt it will get below 90 under the lights even with out a cover but im a first time chick-mother. ALso, is it worse for then to be too warm or too cold (within reason)?