Baby chicks do beautifully in MUCH cooler environments than conventional wisdom suggests. We start ours off next to a hot water tank for the first few days, then put them there only at night. In the day, starting at 4 or 5 days, they're in an indoor pen in room temperature (about 70) with no heat, and at 7 days we put them outdoors during the day with no heat, as long as it's above 60 and not windy. We just moved our 17-day-olds to the outdoor pen, where they are bedded down in an insulated cardboard box on a thick layer of straw. They have a hot water bottle nearby and it's 57 degrees out and they're just fine.
We've handled chicks like this for years, and the only time I've ever lost a chick was when a mail-order one arrived half-dead. You can tell when chicks are comfortable because they spread out and run around in their pens, and their voices stay soft and contented.
The whole thing about keeping them at crazy hot temperatures under 24-hour lights is just bizarre. If you watch a mother hen with chicks in a cold spring day, you'll see the babies out and about when they're only a few days old. By the time they're a week or so old, they're only running to cuddle up to Mom now and then, and are out scratching around a lot of the rest of the time.