Where do you get this lamp from, what ballast do you use for it, and what kind of reflector do you prefer. Sativa.

get your bulb from
http://advancedtechlighting.com/
any magnetic HPS ballast will work electronic/digital does not work.

What is a good supplier in the US for GE CMH? I'd like to set up a nice CMH garden. Is the GE Ultra Max ballast available from discounters like ebay or HTG? A regular HPS ballast is just a bit over a $100. Sativa.

I just bought my philips cmh from advanced tech lighting (see link below). I'm sure you can also find some on eBay, i've never seen the GE bulbs, but if they have better lumens output i'd go with that.

The only problem I have right now is dealing with 100 degree heat outside with a 400 watt ballast running indoors.... my house feels like an inferno right now.

Here is a link that might be useful: http://advancedtechlighting.com/