Unpowered LED lamp shining when lit with a UV (365 nm) LED flashlight. 2 Uncategorized December 8, 2023 December 8, 2023Unpowered LED lamp shining when lit with a UV (365 nm) LED flashlight. View Reddit by 1Davide – View Source
Each LED “filament” consists of a string of LEDs in series. Blue LEDs are coated in phosphors that fluorescence to convert blue to a soft white light. The UV LED flashlight excites the phosphors so the filaments light up.
Credit: u/ValuaSwitch
/r/mildlyinteresting would probably love this.