Based on what I've read here, with a good, reflective grow tent setup, this fixture should produce daylight intensity light levels over about 16 square feet of plant area. As for growing and flowering, that's more a function of light color than brightness - for vegetative growth, people use bluish lights with "color temperature" of around 6500K, then for flowering/fruiting, they switch to more reddish lamps with color temperature of around 3000 or 3500K. In my view, fluorescent is the better way to go, because you have more control over the light spectrum by choosing different lamps. But, pay attention to the lamps' photometric data - sometimes you have to dig, or ask for it, but you can usually get a copy of the output spectrum for a specific fluorescent tube. Two lamps with the same color temperature rating can have very different outputs - you want lamps that emphasize the blue/violet, and the orange/red parts of the spectrum, because these are the colors that chlorophyll is most sensitive to.
I'm currently running 6 tubes of 2800 lumens each - 1@ 3500K, 2@ 5000K, 1@ 6700K, and 2@ 30,000K (blacklight blue). The first 4 are on 18 hours, off 6, and the BLB are 24-7, mounted low, behind my flats, shining UP into the reflectors of the other 4. When the primary lights go off, the UV from the blacklights triggers a dim, bluish, secondary glow from the primaries (barely visible in the 3500K, most visible in the 6700K - it kinda looks like moonlight.) About every third day, I'll turn the blacklights off for an overnight of pure dark. My plants seem to be really happy with the setup - there was a dramatic increase in growth rate when I added the blacklights.
Anyway, that Pioneer seems like a great unit, good for 16, maybe 20 square feet of plants. Just make sure to get some vegetating lamps (6500K) and some flowering lamps (3000K), and swap them out when you want to start flowering.