Hi am am looking for 4 1000w digital ballast as well as reflectors. Ive been shopping on amazon and ebay for the past 3 days. All the ballast look similar and have the same type of specs. The only thing different is the color and seller. How do you i know these ballast will last? I can not take the chance that these ballast will fail.. The tough thing is that I am on budget. I am not looking to spend over $200 per ballast. I really like the Solistek ballast but they are really out of my price range. Can someone please give me some feedback regarding ballast on ebay/ online? thanks a lot.