What brand bulbs you running on M58 ballasts

[Quinster]

I am just wondering what brand and temperature bulbs people are using with the M58 ballasts. I was unhappy with the color of one of my bulbs and the retailer suggested M138 or electronic....so what you running?

[Gizmo]

I use a M58 Ballast and I'm using XM's 20K 250W bulbs. I love the blue look, but if u wanted a more neutral white go 15K. I "made" my own metal halide system using replacement Ballasts from the electrical wholesaler my company uses. Works 100% kickass