Phosphorescence is often used in scientific contexts to describe materials that emit light without heat.

Science Connection

Phosphorescent materials are used in safety signs and emergency exits as they can glow in the dark.

Safety Uses

The glow of phosphorescent objects lasts longer than fluorescence, often visible for several hours.

Persistent Glow

 at night with these black lights now they'll show quite well from a couple of feet why do they glow like this well we really don't know what makes them what's the phosphorescence so what do you do when you find them I just grabbed him by