Okay, I want to buy these HID conversion kits for my headlights and Fog Lights. I know the fogs are a simple plug and play but If I convert my head lights, would I have to go out and buy a HID fitted healamp? I know that Nissan offered em for 2005 altimas, so actually, in theory, cant i just go out and buy a pair of HID ready headlamps used or something and plug those in? or atleast retrofit em? I hope this doesnt confuse anyone. I would just hate converting my lights to HID and have ppl flash me because my light scatters. Thanks.