Quote Originally Posted by Vancefish
I asked this question in the which light post below this one but no body replied. So, I re-posted as my own thread.

I've investigated lighting and have settled on (I think) duel arc (both MH and HPS in one bulb) on 1000w systems. Issue is, I can't seem to figure out which ballast runs these bulbs. Are they run by an HPS ballast or a MH ballast? I plan to run two of these in a 6'X10' room BTW.
Here is a link to see a bulb: Ushio Dual Arc Lamp (MH & HPS In One) - 117,000 lumens (1000 Watt)
I'm NOT promoting this specific site, it's just where I found this bulb.

Any info on this ballast issue would be great.

Thanks
That's an easy one.
While I'm unfamiliar with that particular bulb, the Eye Hort Dual-Arc uses the HPS ballast. :thumbsup: Personally, I'd go with the Eye bulb, if going with the dual-arc. Just a personal-preference thing.

Good Luck!

HTH