I have four nest boxes 18" off the ground (roosts are 2' to 5') each box is 12"w X 14"d the sides are 18" high but open at the top. should I put a top on them? I was going to put a light in the coop for the winter to create more daylight. However after reading that some of you don't, to give your girls some rest. I am reconsidering it. I don't know why my girls need rest they haven't done anything yet but eat, sleep,and poop. since I got them If I do put a light in, where should it go? in the center of the coop, over the roost, or over the nest box?