Radiant compass
Glow-in-the dark items store and radiate visible light. They radiate even more light if hit by ultraviolet. I hung this compass by a thread and "charged" it up using a UV flashlight.
Side note, most fluorescent bulbs and even some LED lights emit visible white light by starting with an ultraviolet source such as the ionized gas in the fluorescent bulb which then strikes a phosphor surface causing it to glow white.
Radiant compass
Glow-in-the dark items store and radiate visible light. They radiate even more light if hit by ultraviolet. I hung this compass by a thread and "charged" it up using a UV flashlight.
Side note, most fluorescent bulbs and even some LED lights emit visible white light by starting with an ultraviolet source such as the ionized gas in the fluorescent bulb which then strikes a phosphor surface causing it to glow white.