if the light is orange not pink, its great for flowering. I have orange fluoros for box flowering, and I find its better than large grow hps for manageability and almost equal quality. Mind as well use both, just make sure the cfls are close to the plants, whilst the hps a few feet away at least, especially at first. More lumens the better, but that hps will fluctuate temps a few degrees, so you may have to manage temperature control, and you will need to vent with an hps system.