It does help loads Bob and thanks again.Perhaps i was not too clear in saying what i wanted to say...here's my situation in a nutshell...I have a veg room that's 2'x4'x53" ....i guess cabinet would be the better term.I also have a 3'4'52" flowering cabinet.in my veg cabinet i have 3 two tube 4ft reg. flour. shoplight fixtures. in my flowering cabinet i have the two 500 watt cfls that i mentioned.i've got ventilation and mylar and all that good stuff but even with flowering 2 plants under those cfls i figured a little more wouldn't hurt but all i ever hear talk off on the postings here are about warm white for flowering.when i saw the cool white ,knowing that they were mostly blue spectrum ,i wondered if they would even be worth having in the flowering cab.