1)Go to walmart and look for a brand called Axius. Get 20% (35% doesnt work well). It will be about $12 and come in 26x78 inches.
2)Measure tint around light, allow extra material and cut appro size of your light.
3)Apply windex (ammonia free which is clear) on taillight and inside of tint
4)Smooth down tint (including air, windex, etc) using a credit card wrapped inside a couple of pieces of paper towel.
5)Let dry for a day.
6)Using razor or exacto follow lines of your taillights to cut tint to match shape.
Done. Jon.
p.s. the tint is removable and reapplicable. Also you will get enough material that if you f up you can keep trying. I will try to post a pic of my car but if it doesnt work follow my link.