Dugukolo jukɔrɔ yeelenw bɛ baara kɛ ni LEDw (diode minnu bɛ yeelen bɔ) ye i n’a fɔ yeelenbɔlan. LEDw ye fɛnw ye minnu bɛ kɛ ni semikɔndukiri ye, minnu bɛ baara kɛ kosɛbɛ, minnu fanga ka ɲi, ani minnu si bɛ mɛn. Dugukolo jukɔrɔ yeelen na, LED bɛ siri fanga sɔrɔyɔrɔ dɔ la lanpan minɛyɔrɔ dɔ fɛ, ka kuran fanga sɛmɛntiya ka kɛ yeelen ye, ka yeelenba bɔ.
Funteni-minɛn min bɛ dugujukɔrɔ yeelen na, o fana nafa ka bon kosɛbɛ. Ikomi LEDw bɛ funteni hakɛ caman lase yeelen bɔli waati la, funteni tiɲɛni cogo bɛnbali bɛ se ka nɔ jugu bila yeelenbɔlan ka ɲɛnamaya n’a baarakɛcogo la. O la, funteni-minɛn ka baara ye ka o funteni in tiɲɛ joona, ka a to a ka baara ka ɲɛ.
Lensɛri min bɛ dugujukɔrɔ yeelen na, o fana jɔyɔrɔ ka bon kosɛbɛ. A bɛ se ka yeelen sinsin walima k’a jɛnsɛn, ka yeelen nɔ suguya caman dilan. Dugukolo jukɔrɔ yeelen na, lensɛri bɛ yeelen min bɛ bɔ LED la ka taa yɔrɔ kɛrɛnkɛrɛnnen dɔ la, o bɛ yeelen nɔ bonya.
