Dual 600's rock!
They're quite a bit more efficient than separate ballasts, and way more light than a 1000w.
AFIK, they're only for HPS though. You could run a conversion bulb, but they're expensive.
I don't even think anyone makes a 600w MH bulb, unless its very new.
psteve Reviewed by psteve on . Question about dual 600 ballast compared to a 1000 I have a 4x5 area to light with 6 buckets, I was looking at running my 400 (over 2) and a 1000 (over 4), but I am not sure I can run two ballast with out some extra wiring, which is not too big of a deal. I seen a dual 600 and thought about splitting that between the 6 of them and maybe just the the 400 for sidelight in the last 4 weeks. But my question is, would I be loosing much "light" by running the 600's instead of the 1000, and would it matter? Any issue with the dual ballast? I Rating: 5