That's funny, I heard that white bulbs drive the chicks crazy. I heard that also from a friend who lost 600 out of 1000 chicks after stressing them out from white light. but, if it works for you, I don't know what happened to theirs!
That was a lot of chicks!!! And 60% fatalities, sounds more like management issues but what do I know I'll probably be overwhelmed brooding that much also, LOL. Similar to my kindergarten going to a class of 100 toddlers/kids w/ only 2 teachers.