So is there a downside to buying the HPS bulb, reflector and ballast on ebay? They are definitely cheaper, and if the ballast is supposedly new is there anything I need to worry about (aside from the typical ebay shit). My only real concern is an electrical fire or the ballast failing very prematurely. I wouldn't consider anything that I needed to wire or build myself, just kits that are ready to use. What about refurbished kits? Thanks in advance