Hi. I have looked on here and haven't found a definite answer. My question is that is it OK to keep a red heat light on all night? All my chickens are from 24 weeks to 2 years. I turn the light on when I close up the coop at 8pm and I turn off the light at 7am. Nothing seems to be stressing them out. If I do get a timer, should I gradually decrease the time the light is on? The coop isn't all lit up, they do have 2 perches they can roost on and that is just above the light, and some dark places with no light. It is a 250 watt red heat light. Thanks