I think modern photo-chromatic lenses made with for sports activities have come a long way. I bought a pair of Julbo sunglasses about a year ago. They are AMAZING. The advertised Visible Light Transmission range is 12%-87%. To my un-scientific eye it looks like they go from nearly clear to nearly black. I can put them on in the garage and ride out into a bright sunny afternoon with no problem so I guess they transition pretty quickly. They are certainly able to keep up with the setting sun.

Link, if you’re interested. They’re pricey but I fully expect to get many years out of them. You want the Translucent Black/Gray with the 0-3 lens.https://www.julbo.com/en_us/sunglass...6=159&318=4928