Visit https://Brilliant.org/NileRed to get 20% off a year of Brilliant Premium! ------------------------------------------- Note: In my equation for ZnS + O2, please ignore my explanation below it. It doesn't make sense. Ever since I was a kid, I've been fascinated by things that glow in the dark. I had a few glow toys that I really liked, but I either lost them or gave them away. I could've just bought some new ones, but I thought it would be a lot more fun to make my own from scratch. Gyzm