Ok so i've had my chicks since August 26th, and in a small brooder up until September 19th. Now in a large 4'x4'x3-1/2' corrugated box w a light hangin off the top of a bookcase shelf. Gradually decreased the temp by 5 degrees each week with a starting temp of 95 degrees. I am located in Brooklyn, NY. The current temp outside is in the 70's during the day which matches the climate of the brooder. However at night it drops to like 55/50. I plan on moving them outside as i build the coop this weekend. Question is, is it mandatory at this point for the brooder light to stay on 24/7 if i am able to maintain the temp without it? Wouldnt it be better to turn it off in the evening to simulate outdoor conditions?