I have a low watt red night light on for my birds. My big girls are two years old. My younger ones are a year old. My babies are 2 weeks old. It might not make any difference to them but it does to me. One night my big girls night light burnt out and when I went out in the pre-dawn to check on them they were all on the floor of the coop, so I promptly replaced the bulb. I went out the next early morning and they were all in their places on their roosts. I don't know if the light had anything to do with it or not but it made me feel better. I use a 11 watt red sign light bulb. I figured out by my electric bill that it costs me about $3.00 a month to run 24/7..
