I'm looking to get an aftermarket fog light kit because I want to avoid melting plastic when put in HID's. What size fog lights do I need? I believe that they are 4" around (portion that is visible) but I may be wrong. Also, I want to wire them directly to my parking lights (with a relay in the line) so I don't have to worry about forgetting to shut them off. Will that work or will it be too much for that circuit to handle?