I have 4 chicks in a tupperware tote with hardware cloth covering a huge square we cut out of the lid. Initially, I just had the plastic lid resting at an angle at the top, but at 2 weeks they started climbing the feeders and perching on the edge of the tote, and I have dogs, so we cut a hole in the lid, added the hadware cloth and use that now.
When my 100 watt bulb became too hot for them, no matter how high I put it above the tote, it still heated them up pretty good, so I switched it to a 60 watt bulb, and that worked great, dropped the temp by ten degrees and gives them a lot of escape from the heat on the non lit side of the tote s it sits at a nice 65 degrees and they are now 4 weeks old I think.
My feeder and waterer MUSt be elevated as they do fill them with shavings every five seconds otherwise. But at four weeks, they have outgrown the tote, and tommorow we will build something similar to a whelping pen to house them, and I may shut the light off as its always about 70 deggres in the house.