if you plan on flowering those guys you are going to need alot more light... The benchmark is 50 watts per square foot of grow area. You have maybe 80 watt? Look for a bunch of those 42w 2900k CFLs. Those work graet for flowering.
Get about 6 and thats a 250w CFL. They have y adapters so u can put 2 in one ballast and they sell cheap socket ballast at home depot. The more light... the bigger the buds..