Yeah at the moment I don't know what flashed through my mind. Potentially thinking sulfur not phosphorus. Coming back around to the post I would agree with you on that.

White phosphorus emits a faint glow when exposed to oxygen – hence the name, taken from Greek mythology, Φωσφόρος meaning "light-bearer" (Latin Lucifer), referring to the "Morning Star", the planet Venus. The term "phosphorescence", meaning glow after illumination, derives from this property of phosphorus.