i've seen nice harvests come from a closet grow lit by nothing more than flouro's...a shitload of flouro's but all the same, it worked well enough. but if you work out the math you'll find the costs are virtually the same for buying and using when switching to a 460-600. i have 10" clones doing great under 3 dbl banks of 40w flouros (240w total) but they'll do better when the sunmasters become available for vegging again...

iow, if you can add more flouoro's, do so...but you'll get enough this time to want more the next, i'm sure...

good luck