A word on using LED's. Brian has incandescent driving lights on his FJ-40. He uses 6, one under each wheel well, one in the front and one in the rear. This lights up almost everything under his rig and them some. It's got a great throw.
To have comparable illumination under my rig I will need to run 8 LEDs. One under each wheel well, one above each slider, and one in the front and rear. This still will not throw as far as a 55watt driving light.
The benefit to using LED's is size, life, and power draw.
While 6 55watt driving lights will draw 23 amps at 14 volts.
8 3w LED's will draw almost an 8th of that depending on the driver.