I just looked at that bulb too. Just like any CFL the ballast is part of the bulb.

What I find interesting is I, for the life of me, can not find any info on the lumens this bulb puts out. I built a CFL/tube light hood totaling 333w which puts out 17,900 lumens with 4 x 4' 2700K tubes, 4 x 23w 5000K CFLs and 3 x 27w 6500K CFLs.

I'm curious what these put out, but even Hydrofarm themselves don't have it on their site. I'm sure it's going to work great! However watt to lumens efficiency is an unknown, without that number.:wtf: Makes me think they don't want us to know.

Hydrofarm - Hydrofarm FLC200D 200 W Compact Fluorescent Bulb - Daylight