To prevent that one thread from getting off topic...
The trick with Transition Lenses in cars is to either have the car window open enough for them to transition. Once they've actually shifted, it does take a long time (an hour for me at least) for them to start changing back to normal. As long as they are getting hit by UVs, they'll transition.
One trick I use is that I leave my glasses near a window while I sleep, so that when it's daylight and I've woken up, they've already transitioned so when I get out the door, I'm already ready to go. Normal windows don't block the rays, but car windows do for some strange reasons.
You have to be careful not to leave something in the way of the lens though, otherwise you might end up with a full transition on half of the lens and no transition on the other half. It's kinda weird.