I had driver and passenger side, side doors, and rear door window tint done on my previous van, years ago at a pro shop somewhere in No VA, I think it was, and loved it. Had it on there for years driving all over the country. Kept the heat blocked and increased privacy. Made it more difficult to snap pics through of passing scenery, but the trade-off was well worth the comfort and convenience.
It wasn't limo dark, and was legal for wherever I had it done. But, rolling through western PA one time a state trooper pulled me over. Said my driver and passenger window tint was too dark for PA and it didn't matter where I'd had it done, or where I was registered. Gave me a ticket that would be nullified once I had a state trooper from my registration state verify I'd had it removed within 48hrs or something.
So I stopped at the first state highway patrol station in the state in which my vehicle was registered and told them the story. They grinned and one of them rolled his eyes and asked "Did the PA trooper have his little chin strap on?" When I told him the PA trooper wasn't even wearing his trooper hat when he came up to me, they all went "Whaaat? That is OUT of UNIFORM!" and "Jeez, those guys..." while shaking their heads.
Evidently troopers in neighboring states like to dis each other.
They said they'd come check the opacity with their tester. The Lieutenant followed me out and kept joking about the PA troopers. Turned out my tint was a shade too dark for my home state (legal where I had had it done), and even though I'd had it on there for years, had to remove it, get re-tested by a state highway patrol office, and send their verification to PA so I wouldn't be fined. I could leave the tint on the side door and rear door windows, which were a lot darker than what I had on my driver and passenger windows. So dark you couldn't see in even at night with a light on in the van.
The only windows I have on my current van are the windshield and front side windows, none in the side or rear doors, so am contemplating getting tinted again because I spend so much time in the desert borderlands. I like the idea of the clear UV retardant film and had not known about it.
So, thanks for the thread and info!