Question on dial/bezel patina

[KFP55]

I’ve heard mixed things on whether UV exposure increases or slows down dial/lume/bezel patina. Some say sticking the watch in a safe speeds it along, which makes no sense to me...can anyone explain if this is true and what would make it so?

I recently acquired a 16710 with Tritium lume, which I understand is the best lume to transition to the desired creamy color over time. It’s 20 years old and has begun to transition, but barely lights up even with direct sun exposure. Is there any way to restore the lume but keep the aged color?

I also have a couple extra bezels and was thinking I could leave one in a window to fade over time and keep another new-looking to have options. Would this work? If I were to leave the watch in a window rather than in a dark safe, would the dial and lume age more quickly?