"Night Pearl" is a natural gem, which can be seen clearly by human eyes in the dark. The night pearl is a fluorite mineral, and its luminescence is related to its rare earth elements and related electron movements in minerals. When electrons in minerals are stimulated by external energy, they change from low energy state to high energy state. When the external energy stimulation stops, the electrons change from high energy state to low energy state, and this process will emit light. To know that it has how bright, take a look at the photos:

The brightness should be determined according to the external stimulus it receives. There is a message here: when the electrons in minerals are stimulated by external energy, they change from low-energy state to high-energy state, and when the external energy stimulation stops, the electrons change from high-energy state to low-energy state, and this process will emit light. Rare earth elements enter the fluorite lattice and can emit light for dozens of hours after being irradiated by fluorescent lamps. During the day, the cover is shining, but it can't be seen during the day and can be seen at night.

Finally, in fact, you are not an idiot. ...