Lumen
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Definición
La unidad derivada del SI de flujo luminoso, que mide la cantidad total de luz visible emitida por una fuente por segundo (1 lm = 1 cd·sr).
Explicación
A 60-watt incandescent bulb emits about 800 lumens; an equivalent LED uses only 8–10 watts for the same output. A candle produces roughly 12–13 lumens. Unlike watts (which measure power input), lumens measure actual light output — making them the correct metric for comparing bulb brightness across different technologies.
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RELATED TERMS
Metro
La unidad de longitud del SI, definida como la distancia que recorre la luz en 1/299.792.458 de segundo.
Kilogramo
La unidad de masa del SI, definida mediante la constante de Planck.
Segundo
La unidad de tiempo del SI, definida mediante el átomo de cesio-133.
Kelvin
La unidad de temperatura termodinámica del SI, cuyo punto de partida es el cero absoluto.
Amperio
La unidad de corriente eléctrica del SI.