Hello tCreator,

I've got a dual-balast by BGHydro (I don't think they manufacture it, but they sell it). It is one box, with a 400W MH ballast and a 600W HPS ballast.

So far, so good. I like it! I'm in the process of building an air-cooling box for it. It has the heat sink fins on both sides, so I'll be using a 50 CFM fart fan to cool it. Much better to have cool electronics than hot ones. Unless you're working with a Tesla coil...