My 3-day olds (25 Cornish X Rocks & 15 Golden Comets) are doing great in their brooder with a 250 watt infrared bulb. I'm hesitant to leave home as the temps vary from 80 degees to 95 in the brooder while outside temps change. Yesterday, I came home from work at 2:30 in the afternoon to find the sun beating down on my coop and temp inside the brooder to be 102. I turned the light off and opened up the brooder to cool things down a bit. The chicks seem to be doing just fine with the temp swings. However, I bought a lamp timer and will be turning the light on and off during the heat of the day to atempt to keep a somewhat constant temp. Wondering what others are doing (besides raising and lowering brooder light) to maintain temps with an influence of outdoor temps? Will the light turning on and off have an affect on these little guys?