I purchased a great timer that replaces my light switch and activates the light fixture on the ceiling. It's programmed to come on at 5 am and off at 8 am. Then it comes on again at 3 pm and off at 6. If I would wish, I can push a button and bypass the timer and it will automatically reset itself. Of course I paid $28 on Amazon for it, but I didn't want to add another bulb to the coop when I already had one.