LED yeelenbɔlan fɔlɔ, min bɛ baara Kɛ ni yeelenbɔcogo ye min bɛ Kɛ ni semiconducteur P-N ɲɔgɔndan ye, o dabɔra san 1960 daminɛ na. Fɛn min tùn bɛ Kɛ o waati la o tùn ye GaAsP ye, min bɛ yeelen bilenman Bɔ (λp=650nm). Ni bolifɛn bolicogo ye 20 mA ye, yeelenbɔlan tun ye lumen ba damadɔ dɔrɔn ye, o bɛ na ni yeelen nafa ye min bɛ se 0,1 lumen/watt ma.
San 1970 cɛmancɛ la, In ni N fɛnw donli ye LEDw dɛmɛ ka yeelen jɛman (λp=555nm), jɛman (λp=590nm), ani oranjɛ (λp=610nm) bɔ, wa yeelen nafa bonyalen don ka se 1 lumen/watt ma.
San 1980 daminɛ na, GaAlAs LED yeelenbɔlanw bɔra kɛnɛ kan, o kɛra sababu ye LED bilenmanw ka se ka yeelen sɔrɔ min ye lumen 10 ye/watt.
San 1990 daminɛ na, fɛn kura fila yiriwali ɲɛnabɔlen-GaAlInP (yeelen bilenman ni jɛman bɔ) ani GaInN (yeelen jɛman ni bulu bɔ)-ye LEDw ka yeelen nafa bonya kosɛbɛ. San 2000, fɔlɔw ye LEDw dilan minnu yeelen fanga ye lumen 100 ye watt kelen na yɔrɔ bilenman ni oranjɛ la (λp=615nm), k’a sɔrɔ filanan ye LEDw dilan minnu yeelen fanga ye lumen 50 ye watt kelen na yɔrɔ jɛlen na (λp=530nm).
