I don't know how dark the tint is I put on my Xterra in 1999. Fairly dark in front.

I have light sensitve eyes with excellent night vision, so maybe that's why I don't have a problem seeing out of it. It's probably not 20%.

I do live in Arizona, and the sun burns bright even at night, or so it seems.

If a cop pulls someone over SOLELY for tint, in my book that cop's an ass, sorry Paul. I see vehicles all day that are so black up front you can see nothing.......so maybe Arizona has a different law. I do notice that cars with midwestern plates have NO tint, not even the back and sides. We consider that strange.