Saw a light today, looked like a standard 3157 backup light, installed in a security vehicle at Disney. Was flashing amber, but still had a white backup function.
I was thinking they would make a good aux brake light, like replacing the backup lights with something like this. Normal op is white, but hooked to brake lights and flashes red. Using a couple Feniex lights on the license plate bracket as aux brake lights.
i have seen the ones with white and amber, just shocked disney would bother with changing out the led socket to accept the dual filament bulb instead of just drilling a hole and sticking a vertex in it.
I didn't get a close look at it. Was sitting in a parking lot flashing, then he put the car in reverse and bright white, no yellow seen until he pulled forward.