Couple of coats of tinting spray im sure.
he used tint spray, eventually removed it useing paint thiners, and then changed the lights, since then hes had another 2 cars, didnt use brighter bulbs and no trouble from the police tht i know of
Should be easier for you with the red rear lights just looks crap on FR/cupra rear lights. You can't use LED in the rear lights either makes error messages come up, you can with the fog and reverse light though I have!
What are the LED bulbs then? I assume they're not the type made up of lots of little lights?