Lighting question

First post on the city, I've been reading for a while and finally want to get some input on my grow. I'm using all CFL's and planning on growing 2-3 of the sprouts I have going now, and want to ask here before any major concerns come up.

Right now there's 2 26w 6500k bulbs and 1 26w warm bulb (forget the light spectrum, it's around 2600k). Is it ok to mix the two spectrum's during vegetative growth? Also, about how many watts should i shoot for for all 2-3 plants once they start growing? My last issue deals with the flowering stage - should i use an equivalent wattage as the vegetative stage?

Thanks in advance!