Im pretty Noob man so don't hold me to this, but you can totally grow with a florescent. If your going to I'd reccomend a bunch of CFL's instead of just one big florescent. Im not sure about the color temperature, Im pretty sure plants like 6700 for either vegging or flowering, but like a 2700K for the opposite. If you already have this light im sure that with a couple CFL's around it would work fine, although OF COARSE in a perfect world a HPS MH combo would be "preferred"