The first chicks I ordered I didn't know anything about red lights and all the calming stuff. I just used regular lamp bulbs in a reading lamp and they were all as calm as chicks normally are...no pecking each other and such things. Just eating, drinking and running around...lots of sleeping...but no pecking each other.
I used the red bulbs with this year's CX and found the bulbs really get hot...too hot. I really didn't like that level of heat at all and really had to keep the light pointed towards one cornerl of the brooder to keep it from making the CX into Cornish Game Hens, sizzling and succulent. The brooder was very large and outside in pretty cold temps, so it kind of balanced all that heat but I don't believe I'll ever use that kind of bulb again.