I bought something like this: https://patrickadairsupplies.com/products/ultimate-neon-glow...

from another supplier about 8 years ago and still haven't managed to use any of it, beyond just being in awe of how well it glows in response to a UV light.

take your UV light and a jar of peanut butter into a dark room...

I'm glad I'm not the only one contemplating poor-but-amazing life choices...

You definitely are not

Same. Even though I have no idea what I'd use it for I still want to buy some

Perhaps a smaller amount? I know the conflict... I'm checking my play money kitty for exactly this. =)

lol, I bought a dozen bright tritium vials as gifts for some coworkers, but I was going to deliver them in person a couple of months later, so I held on to them until then. It was hard to let them go!

Glue one to your deadbolt handle, and you can see whether the door is locked at a glance, from across a dark house! Hang them from your ceiling fan pulls, and no more fumbling around for them in the dark! (for complicated reasons, we don't control ours with the switch) Putting one on your keychain is a no-brainer, but still an awesome idea! And so on...