I got 20% now, had 10 on my suburban i get pulled over once a month or so for it. got one ticket in the suburban. and then went to the eye doc and said the sun gives me a migraines and i got a prescription for window tint. it allows me to put down to 10% all the way around and 35% on the windshield .. i have not gotten around to having the windshield done but when ever i get pulled over i show them and on my way i go.. some times they dont even ask to see proof of insurance after seeing the prescription