we have six lights total. four smaller CLFs and two of the big CFLs (the one i showed you). let me take a picture of our setup hehe. we are only using five right now.
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yes you can use them for veg and flowering, everyone has different preferences on the amount of light - whether it's lumens, wattage, whatever... a few ppl gave you a good amount of lumens/plant info. we haven't started flowering yet but will beginning next weekend.
just keep an eye on threads that strike your fancy here and pick up the good info and you will learn a lot! also pick up a good weed growing book. one by Jorge Cervantes or some other one my bf likes, Marijuana Growers' Guide by Mel Frank