I used flat topped 5mm wide angle LED's. They are clear when off and orange light. I just used a 4mm drill bit to make my two holes, then used a small file to open up the hole just a tiny bit more and the LEDs are nice and snug. Each LED has a resistor or it to knock the voltage down to a safe level for them, 470 ohm I believe. Mine are tied into the rest of the interior lights for now, I actually ran a line from the front dome lights. I am working on a switch that will let me use, both the leds, and the factory lights, just the factory lights, or just the led's when the doors open. We will see how that comes out. For my foot wells I am working on two strips of 20 LED's each. I just ordered some pc board strips in 18" lengths to make it happen. I will keep you posted.