I believe I have a bad ballast in my 72" Geisemann for one of the T5's. Before I go through the hassle of taking it down, I plan to buy a replacement ballast. Probably not a bad idea to have a spare if it turns out to only be a bad receptacle or whatever. Anyone know the make and model number of the ballast? I can barely make it out from the end and it appears to be a small unit in there. Where are they for sale?