I've actually wanted to do the HID reverse lights, but I'd rather go with an extremely bright 9 watt LED like becksmerc did, This way you don't have to wait for them to warm up before you can see, haha.
As for the LEDs, I did LED lights all the way around on the exterior, load resistors and all.
I even found the right combination of resistors for everything work nice. I got mine from amazon!
You'll need two 50W Resistors for the front, and two 25w resistors for the rear.
Here they are:
50W: http://www.amazon.com/Resistors-Signal-License-Warning-Cancellor/dp/B004EDF8HY/ref=sr_1_1?ie=UTF8&qid=1349133481&sr=8-1&keywords=led+load+resistors - $8.99
25W:http://www.amazon.com/Resistor-Hyper-Blinking-Warning-Signal/dp/B002CJQIGW/ref=sr_1_6?ie=UTF8&qid=1349133481&sr=8-6&keywords=led+load+resistors - $3.99
I've been using them for over a year now with no issues at all. No hyper flashing. Careful where you mount them! They get quite hot!
But I must admit, if you do ALL the lights, including the plate in LED (not the headlights or high beams) You'll have an issue with not enough current draw. For instance when I turn on the left or right turn signal, every light on the parking circuit flashes with it. But I added aftermarket Fogs that pull power from the parking light circuit, So long as those are on (but not operating) I don't have a problem with lights flashing. I'm pretty certain a 5th resistor added on the license plate light can help solve this. Just a little more current draw.
Last edited by CruisinG6; 10-01-2012 at 05:23 PM.