I have pics up of my car with them in somewhere. Here they are. The normal bulbs that come with them lock into place, but i broke one of my bulbs so i had to buy a extra set lol so i have a extra set of of the metal pieces left. The blubs slide in. Prevent most of the light form going down, and reflects it up into the lense making the lense place onto the right area of the ground, instead of spreading the light EVERYWHERE!. Heres a pic.