ルーメンルーメンFreq.FrequencyTop 50,000Meanings1nounlumen (unit of luminous flux)physicsPhysics term for the SI unit of luminous flux. Used in technical contexts such as lighting specifications.このLED電でん球きゅうの明あかるさは800ルーメンです。The brightness of this LED bulb is 800 lumens.
