S1A activated by UV light

This is a booby-trapped question in all honesty. I know the answer, and I am quite sure the answer is not in Google because NO flashlight fan would probably have any incentive to know this. Here’s the two sources I ran across: a YouTube Post:
[ https://www.youtube.com/watch?v=4XmhmzPSE10 ]

…and a thread on Reddit. I’m much too late to comment on Reddit, but even the genius ToyKeeper has gotten it incorrect, along with several knowledgable people!!

https://www.reddit.com/r/flashlight/comments/a4dy5p/undocumented_featured_olight_s1a_can_be_lit_using/

There are a LOT of VERY incorrect answers. Let’s see if someone here can answer it. I know the answer, yes, but am curious to see if someone can answer it short and sweet. Two words should cover the whole answer.

Let the games begin!!!