should I be able to run a reflux bulb on either a hamilton or pfo standard 175w ballast ? If so , I think I purchased a couple bad bulbs . If not , what bulb do you recommend ? I have had no luck getting these bulbs to even fire on either ballast , but I do have an old bulb that will fire on both . anyone have some old 175w mogul bulbs laying around that might work with these ballast ? I am going to need something until I can exchange these bulbs .