CFL Lighting Question

Do my plants need blue spectrum light during the flower period?

The reason im asking is because at the moment i'm using a 250W CFl Enviro light + 125 CFL Envirolight both 2700k red spectrum.

for flowering blue spectrum isnt needed, but ive heard it is benifical to have blue in flowering, have you got any pics of your plant flowering ?

Um not very good ones, my camera sucks. I'm basicaly growing auto's and am wondering if the yield will be better if i add blue light to the mix and if so how much?

Anyone CFL growers out their to tell me if i should bother adding a blue cfl enviro light for my next grow to add to what i got now?