8 of those 23w ones should be great, and definitely check out both MB & BD's grows, they both are doing great & mainegrown's getting it dialed in too. I'll have my log posted in a few weeks after I've run the first plant through. I'm using a 200w 6500K cfl, 12,000 lumens, for mine, ordered a 200w 2700K on the 1st but it's stuck in NJ still