I have read on this forum--I think--that RED light used as a possible heat source in coop in winter would be less disturbing to chickens than a white light. Reason: because RED light is less perceived by chickens than white light. Ergo....... But I've never asked my chickens lol BTW, I am NOT providing light to make the birds lay alot all winter. IMO, they should get a break, esp. in this rugged season of winter. Thoughts from the panel??