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Phosphorescent

usgb/ˌfɑːsfəˈresnt/Volume
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LampPro Tip 1/3
Glow PersistencePlay
The term implies a lasting glow, which continues without an external light source. SlideThe phosphorescent stars on the ceiling shimmered all night.
LampPro Tip 2/3
Safety UsePlay
Phosphorescent materials are used for safety signs because they can be seen in the dark. SlideExit signs use phosphorescent paint to glow during a power outage.
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No Heat InvolvedPlay
Understand that phosphorescent objects do not get warm, unlike objects that give off light due to heat. SlideDespite its bright glow, the phosphorescent material stayed cool to the touch.