Here is 5% limo tint over the two rear lights, as well as the 3rd light above. These are 3M films that worked out great. I had it professionally installed but i watched him do it, it looked easy except for those bumps over the rear lights. Also, oddly the 3rd light has bumps on it too, not hard to place a vinyl over just cosmetically unappealing up close because the film brought out those bumps.
I loved the red films with the middles cut out and almost went that route myself but decided overall the rest of the car was dark so mine as well do the lights that way too.