I'm familiar with tail light tint. I don't recall seeing one that only have a very light light smoke to it just to give it a light film over the red. The closest to that would be the aftermarket smoke led tails from all the pics I've seen.

If I do the tails, it would only be the bottom 2/3 of it. The top clear would remain clear. This flows IMO with the same scheme on the front end with the clear headlights.