grow space size?
i have a 150w hps over 6 in 8" pots with 2 42w cfls on the side flowering, it would be more than enough imo
but if you have a tall grow box you will need more light, also look into MH or even cfls for veg, thats the proper spectrum for the plants 5500-6500 K . i believe the hps is a 2200k
for veg im using 6 23w 6500k cfls over 4-8 6" pots,l they love it, and good for the temps