there have been a few posts about replacing dome lights with LEDs, someone has even made a driver board specifically for replacing dome lights. The biggest obstacle to incorporating LEDs is the driver to regulate the voltage which can vary from 11-14+ volts in cars with the engine running/charging system operating.
If you check over on the site "thedieselstop.com" there are several threads about using LED lighting in a vehicle. Also on ford-trucks.com. They range from replacing the dome lights to re-lighting the dashes and adding LED lights to cup holders.
How about this ?
works on 12V Dc 4xCREE Q5WC 850 Lm
Directly Replace Bike or Car Bulb with some modification
Do you sell those? You've posted that (what may be hotlinked) image a few times before. Looks rather spammy.
Originally Posted by werearemyleds
have seen allot of 12v led's, I assume that they would be fine being wired into a Car's 12v wiring?
I assume you do mean for interior lighting, or for underhood to light the engine bay? LEDs "adapted" to fit in the sockets of exterior car lighting (headlights, turn signals, side markers, etc) are ineffective, unsafe, and illegal.