Phosphorescence of fiberglass fleece
I tested different materials in terms of phosphorescence. A well known material is zinc sulfide doped with other metals.
An other material is europium doped strontium aluminate.
Both materials have one thing in common. Corner-sharing polyeders.
Glass has corner-linked polyeders too.
Thus I took a piece of a fiberglass fleece and held it under a black light lamp...