I'm new to the chickens. My wife and I have 4 hens and one rooster that will be one Easter. We have a regular light bulb attached to the side. We have been leaving it on all day and night. They all go into the coop at night and roost with the light on. Is it OK to keep it on? If not when do I need to cut it off and on. I'm getting 3 eggs daily. Just curious. Wanting advice or just knowledge.