I was just nervous about posting my answer sense everyone before me had posted such long times under lights and cautious exposure to outside. My first batch of chicks I was soooooo overyly cautious about everything and that it be done "by the book" (all the stuff I had read about dropping temps by 5 degrees per week for 5 weeks, only feeding medicated chick start, etc.....I even wouldn't pick them up for weeks to hold or look at them for fear they would "freeze to death" in my hands before I could get them back under the light) then I had a broody mom chicken and watched her w/ her chicks, that was eye opening for me.Yes, I do want to hear your answer!s!!! I am getting ready to move the light today. So many have responded with basicly the same opinion. I will be glad to have the darn light off, especially since we have had to keep them in a corner in the living room. The little brooder (rubbermade type container) we used in the begining was swapped out for a chicken wire type cabinet/crate with front doors my hubby made when they were 2 weeks old. I do clean them often (and the house.....due to them), but I want to move the furniture back to normal! Just waiting for the rain to stop to finish the run and then we will be good to go. Thanks again.