국제단위계(SI)의 조명도 단위로, 1제곱미터의 면적 위에 1루멘의 광속이 고르게 비춰질 때의 밝기를 의미함.
The SI unit of illuminance, defined as one lumen per square meter.
예문:
"The office lighting should be maintained at a minimum of 500 lux for optimal productivity."
"A full moon on a clear night provides about 0.25 lux of illuminance."
"The sensor measures the light intensity in lux to automatically adjust the screen brightness."