Those that watch racing have seen the pulsing brake lighting they use now.
Watching LeMans last week I got on line and looked into buying this for my 928.
My 911 was rear ended bad a few years ago as I sat at a traffic light, Honda MiniVan (not very mini btw) just didn't see me there. All my brake lights (have third too) worked at time.
Worth considering..
Blinking Smart Stop - Flashing Brake Light
Porsche won both GT and GTS classes.