When a tail light is in full sun light, even if it's working 100%, the illumination can be completely invilble as the little globe is completely drowned out by the sun light. The last thing anyone should do is de-rate their stop lights.
After playing with quite a few LEDs, I now have stop lights that will light up the whole neighbours house from across the street at night (ideally they need a day/night mode, but they're about the same as some DOT approved trailer/truck lights any way). Bright LEDs are out there, but you have to be willing to pay for them.
800lms at 6.7W vs ~320ml at 21W
