I was driving behind an Audi S6 (one of the newer models with full led lighting) at night. I found its led brake lights blindingly bright. The driving lights are very bright by themselves, but they're borderline tolerable, however brake lights when they come on are extremely bright - I could not look at that car when driving behind it, it was too painful to look at. I had to take my eyes off that car and off the road ahead of me as a result of this for extended periods of time. I could not have those taillights within my field of vision, they hurt even when I tried to look away from that Audi. I do not feel safe driving behind new Audi and other cars that use extremely bright led taillights. I could have crashed because when I was slowing down behind that Audi that lit up its taillights when braking I could not look ahead on the road and at the car. I had to brake blindly while briefly looking up for a millisecond or two (and suffering eye pain) now and then to ensure I wasn't going to crash into it. I was not able to constantly maintain the Audi in front of me within field of sight due to severe eye pain it caused me. Is there a law that mandates a safe light output by the headlights? because I find led taillights in general painfully bright to varying degree amongst different carmakers, with Audi having the most severely painful brightness (similar to looking at the sun).

- Spokane, WA, USA