I would like to find out what the approval process involves to legally manufacture, sell and use aftermarket lighting fixtures for motor vehicles (for DeLoreans in particular) that are SAE/DOT approved. I've wasted some time searching the DOT web site and became overwhelmed with the number of publications to refer to. If we put enough heads together to find all the answers, then someone somewhere will make these. And if no one else does, then I will (if I ever get around to it). Until then I'm just going to cut & hack OEM fixtures to retrofit. And that might end up being the final answer anyway. So far when I pull up behind a Cadillac and see those new LED fixtures blink so quickly on and off, I notice that condensate drips a lot faster from my DeLorean's evaporator. i.e., the car is drooling in anticipation of assimilating this new technology. :-) Walt Tampa, FL