I always found it super annoying & dangerous when I see tinted taillight that end up blocking a good portion of the emitted light. During the day, the brake lights are almost invisible on some cars & at night they are too dim in many cases to take active notice of as regular nighttime running lights (brakes not applied). Heck, some new cars today with regular OEM taillights are hard to spot, like Mazda, due to their tiny circular brake/driving light rear design. Funny how some taillights are super obnoxious in their nighttime brightness/coverage & others are super lacking & hard to spot. Thankfully, I have found both my Yaris & Corolla to be somewhere in the comfortable middle-zone. The vertical bumper reflectors on the latest Corolla also help a lot in keeping the rear visible at night.