Metal Halide Problems...again!

[GreenSpottedPuffer]

I don't know why I buy used stuff

My ballast seems to be dying again. For a few days, the bulbs would flicker once in a while and then yesterday one of them started flickering non stop and then just stopped working. I left it off the rest of the day. Today is started up again and was fine for an hour before it started flickering out of control again and the ballast started buzzing kind of loud. So I turned them off again.

I know thats not a lot of info but any ideas?

Its the PFO dual 400 watt ballast. TAR style. I know they suck. I think I should just buy a new light set up. I was happy with my electronic 250 watt ballasts but they died on me too! Jeez... I have had bad light luck.