We put our little girls (5 weeks and 9 weeks) outside tonight in their little coop on our front porch. Until now they've been in the house which has been between 70 and 80 degrees with no light in their coop. Since it's supposed to be in the 50's overnight I hooked up a light with a 100w bulb in case they get chilly. They keep however trying to peck at and perch on the light. I'm afraid they are going to hurt themselves with it. Any suggestions?