lumen
noun
the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. lm
lumens
-
pluralof lumen.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But many LED bulbs are installed with a much higher color temperature, near 4,000 Kelvins, which our brains interpret as harsh and bright, regardless of how many lumens they’re actually emitting.
From Los Angeles Times ● May 8, 2026
Langhelm said the LED lamps are pricey because they have a high intensity of “up to 55,000 lumens, compared to a household lamp of about 1,800 lumens,” and they are customized to fit each streetlight.
From Seattle Times ● Jan. 29, 2024
In the early 2000s, white LEDs only offered around 20 lumens per watt, says Paul Scheidt, senior product marketing manager at Cree LED, a major lighting manufacturer.
From BBC ● Dec. 18, 2023
These bulbs can create about 75 lumens with 1 watt of electricity.
From NewsForKids.net ● Aug. 17, 2023
If such a white light were obtained by pure temperature radiation—that is, by a normal radiator at a temperature of 10,000°F., which is impracticable at present—the luminous efficiency would be about 100 lumens per watt.
From Artificial Light Its Influence upon Civilization by Matthew Luckiesh
