MH Ballast Question

[tinkanator]

Sorry if this is a total newbie question to ask, but I'm trying to put together a MH system consisting of 3 250W lamps for a 125 I'll be setting up. I've found a ballast for one of the lights that has an ANSI code of M58 but was said to be a Mercury Vapor ballast, would it fire the XM 10k bulbs I'll be buying? I know an M80 ballast is the optimum choice of ballast, but from what I've read on an M58 it'll produce good PAR numbers, use a little less energy, and had a measured CCT rating of 12083 (as opposed to CCT of 9921 on an M80, so I should get a slightly bluer color on the M58 correct). Thanks for the help

 

[scsinet]

The M58 is a probe start, 250w halide ballast, it is NOT a mercury vapor ballast. Whoever told you that was mistaken.
It will fire the 10K XM SE lamps.
The M80 is just a pulse start variety, but you don't need pulse start for an XM lamp, they have an internal ignitor so you'll be fine.