I have decided to extend my light for laying purposes here in Michigan where we now only have about 11 hours of daylight currently. We will drop to 9 1/2 by end of Dec. My question is Red or white bulb? Does it make any difference? The white bulb (FL energy saving type) would be cheaper from an electric usage standpoint. But the red bulb would provide more heat to coop. My coop is insulated.