Light Emitting Diode
/ˌɛl iː ˈdiː/
n. "Semiconductor p-n junction emitting photons via electron-hole recombination unlike incandescent filaments."
LED, short for Light Emitting Diode, forward-biases GaN/AlGaInP junction dropping 2.8-3.4V while radiating 450-470nm blue light—phosphor conversion creates white CCT 2700-6500K as Stokes shift down-converts 30% energy to yellow filling spectrum gap. Contrasts OLED organic emissive layers by leveraging III-V epitaxy achieving 200lm/W efficacy; PWM dimming at 1-10kHz modulates 0-100% without color shift.