Well, I've put LED's on three of my vehicles now and definitely find them to be both cool and convenient! However, if you're expecting to have them illuminate your path like a full-size car, you'll probably be a little let down. My LED's function to show me where my car is, not so much where it is going. LED's are so strange to me because looking at them head on is enough to just about blind you, but somehow they don't put out the same useable, brilliant light that say a halogen does. But like I said before I think they're totally cool on cars!

As far as getting the LED's, I recommend Hong Kong. On a couple different occasions I have purchased 100 LED's on eBay from Hong Kong for about $.10 a piece ([link=http://cgi.ebay.com/100pcs-Electronic-Components-Parts-5mm-LED-Light-Bulbs_W0QQitemZ7624549933QQihZ017QQcategoryZ66954Q QrdZ1QQcmdZViewItem]Hong Kong LED Source[/link]). I haven't found anything nearly that cheap in the States. Anyhow, as tommythecat said earlier you'll also need resistors, but they aren't too hard to figure out as there are countless calculators and guides on the net. I used a couple different switches to turn my lights on and off. The PicoSwitch works great, is all electronic, and plugs right into an open receiver channel, but is a little pricey at $20([link=http://www.dimensionengineering.com/PicoSwitch.htm]PicoSwitch Link[/link]). A micro switch like this one ([link=http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXWB25]Tamiya Micro Switch[/link]) works great and is very cheap, but it requires a servo to flip the switch. I use it on my Nitro Rustler for the brake lights. There are many options out there and perhaps the most fun is personally designing a system that works for you.

I'll leave you with a few pictures of my vehicles in the splendor of LED's. The first is a Nitro Rustler, the second a Nitro Redcat Volcano, and the third is an electric Tamiya TT-01.