I was wondering if everyone keeps a light on for their chicks? I have 4 - 9 month old RIR's that have been laying for about 3 weeks and 24 - 5 month old chicks and right now I just have a 60 watt bulb for night time. Do you leave the lights on all night? Forever? What about heat lamps in the winter when they are full grown? Thanks for any info! Just Winging it!