Headlight conversion kit

Bought me one of those $50 Ebay Hid conversation kits with the cool lenses. It is pretty much plug and play. Now with no headlights hooked up I get about 12v out to the stock headlight plug. Once I plug one of the new lights in it drops to 8v. I went all the way back to the engine side of the bulk head and checked same readings both ways. Any ideas why I'm getting such a drop? Would a relay help here? Or do I need to keep looking?