Chickens are near 3 months old. My chickens enter the coop at sundown (amazing as it seems) the coop light stays on for about 30 minutes then turns off. Just before the timer turns off the light they all get on one of the ample roosting spots. Shortly after that the light goes off. At sunrise they all get down, drink and eat and in about 3 minutes the automatic door opens and off they go to the run. Life is good