Window tint question

[Dad]

Is it possible to use a photochromic film for car windows? It's the stuff that gets dark in the sun and then light again at night or indoors. I found this website, but I really have no idea if this would work or even be practical. Probably way expensive if it can be done.
https://www.weetect.com/photochromic-sheet-and-film/

 

[wingedflyer]

Is it possible to use a photochromic film for car windows? It's the stuff that gets dark in the sun and then light again at night or indoors. I found this website, but I really have no idea if this would work or even be practical. Probably way expensive if it can be done.
https://www.weetect.com/photochromic-sheet-and-film/

The problem with photochromatic film is that it has to have uv light to change. Most windows filter out the uv light. So they don't work well.

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