This bulb thing has me running around like a chicken with it's head cut off. Mine are General Electic 42W cfl bulbs. After that, I don't know. I've searched the g.e. site, tried both yahoo and google and can't figure out if they're soft white, warm, or cool. I don't think g.e even distinguishes that. Maybe I can find some wavelegth info. But I guess I want cool to veg and warm to flower. I'll go to Wally World tomorrow and see if I can find out something there.