1.25 is the minimum output of the LM317 regulator and it is capable of regulating power up to 37 volts. So basically, the 1.25 is the "overhead" required to run the regulator.

Did you use a regulator, or just current-limiting resistors? If the latter, how much difference in brightness have you noticed with the engine off versus on?


2000 4Runner | 5-speed | E-locker | Tundra/OME 2" lift | Stubbs Sliders | Deckplate/TrueFlow |