I think there may be a better way to do it than i did, but I used one varad Blue Led that i picked up a future shop (best buy in the US) for each light. I originally just did the headlights, and the drill bit i used was perfect size for the job, the LEDs just squeezed right in. However when I drilled the headlights i think i broke a lil piece of reflector off the top, but the lights work just as good as before. When I did the parking lights, I used a slightly bigger drill bit, which meant i had to krazy glue them in. I have them wired to a switch in my glove box.