I hope someone can help. I've been looking for a ballast to fit this light. http://cgi.ebay.com/48-216W-T5-HO-A...183?pt=LH_DefaultDomain_0&hash=item3f0bcb8a17. It is a quick disconnect type ballast. 54w. It has no identifying numbers. Anyone know where to find a replacment. All help appreciated.