Those who follow Jeri’s mad-scientist-like curiosity and sci-tech explorations in her many YouTube vids know that she’s recently been hot to create electroluminescence. In this vid, she tries to make her own phoshor. It didn’t quite work out, but she explains the process and then shows something cool that she did discover, triboluminescence, the optical phenom that occurs when crystal (or other) material is crushed, rubbed, pulled apart, etc. (think: Wint-O-Green Life Savers). Actually, when it’s crystals being crushed, it’s more specifically known as fractoluminescence. Keep at it, Jeri! We know you’ll have a homebrewed EL display in no time.