They were shipped to me July 15 so they're almost 24 weeks! But! Its Dec 27 and we're in Michigan. We've lost a ton of daylight and its cloudy a lot. We try to let them free range in the backyard still but we had a ton of snow on the ground last few weeks so they've mostly stayed in the run. I'm really on the fence with supplemental lighting at this point...I'll wait til the New Years and then I'll decide...for those of you that have done supplemental lighting, how did you do it? We have our water heater on a timer now anyway so I can easily just get a splitter and plug their brooder lighter (with a regular 60 watt light bulb) and have it on from 6am to 12noon to start with? Help please!