Hi I have a 400w pendant style fixture with a probe start(standard) ballast for trade for a T5 fixture. I now converted to fowlr so a 400w halide is above & beyond for my system realistically. Comes with a XM 400w 20k single-ended bulb, which is exactly 12 months old, but still very blue in spectrum. The ballast & socket are wired good and ready to work, currently have it on my reef. Let me know if you're interested
