Originally Posted by ducks unlimited
what kind of led's do they use?
Does who use?
Me, I went on ebay and bought 3mm blue leds w/resistors and the listing said the resistors are included to work with 12 volt systems(car). I am sure you can go to any local electronic store like Radio Shack and ask for leds and resistors to use in 12 volt, car systems. Also at Radio Shack I first bought the regular replacement bulbs(non led) and the package had "mini lamp" 12 volt 25mA #272-1142. I ended up going the led route though.
I have no idea what exact resistor is needed to make an led bulb run with 12 volts, so I trusted that ebay store to send me the right things.
Here's where I got mine from, 50 leds and 50 resistors for cheap money.