lux

[ luhks ]

/ lʌks /

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noun, plural lu·ces

[loo-seez], /ˈlu siz/, lux·es.Optics.

a unit of illumination, equivalent to 0.0929 foot-candle and equal to the illumination produced by luminous flux of one lumen falling perpendicularly on a surface one meter square. Symbol: lx

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Also called meter-candle.

Origin of lux

1885–90; <Latin lūxlight¹

Other definitions for lux (2 of 2)

Lux.

abbreviation

Luxembourg.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use lux in a sentence

To put that into perspective, indoor lighting is about 100 lux, while a bright, sunny day can hit 50,000 lux or more.
Fight Seasonal Affective Disorder With This New Tracker|DailyBurn|November 7, 2014|DAILY BEAST
The “gold standard” dose is 30 minutes of 10,000 lux light, one hour of 5,000 lux light or two hours of 2,500 lux light.
Fight Seasonal Affective Disorder With This New Tracker|DailyBurn|November 7, 2014|DAILY BEAST
However, an overcast sky (like you see often during the winter) usually ranks at only 1,000 lux or lower.
Fight Seasonal Affective Disorder With This New Tracker|DailyBurn|November 7, 2014|DAILY BEAST
Lux entered the stage dressed head to toe in white, accompanied by an entourage.
America’s Poets: Battle Rap Gets Real|Rich Goldstein|July 15, 2014|DAILY BEAST

Even Loaded Lux could not keep a straight face, smiling as his competitor established a clear, early lead and never let up.
America’s Poets: Battle Rap Gets Real|Rich Goldstein|July 15, 2014|DAILY BEAST
Lux, like one crazed, suddenly rushed headlong away between the trees and down the hill.
Maezli|Johanna Spyri
The motto on the scroll, "Ex tenebris lux," appears to have existed anterior to the light of the Reformation.
The Mirror of Literature, Amusement, and Instruction, Vol. 13, Issue 372, Saturday, May 30, 1829|Various
On the screen, a machine rolled in on caterpillar treads, picked up the lux case and its contents, and carried them off.
Islands of Space|John W Campbell
I suggest that we make the hull of foot-thick lux metal and line it on the inside with relux wherever we want it to be opaque.
Islands of Space|John W Campbell
The huge walls of lux metal required great care in construction, for they could not be welded; they had to be formed in position.
Islands of Space|John W Campbell

British Dictionary definitions for lux (1 of 3)

lux¹

/ (lʌks) /

noun plural lux

the derived SI unit of illumination equal to a luminous flux of 1 lumen per square metre. 1 lux is equivalent to 0.0929 foot-candleSymbol: lx

Word Origin for lux

C19: from Latin: light

British Dictionary definitions for lux (2 of 3)

lux²

/ (lʌks) /

verb

NZ informal to clean with a vacuum cleaner

Word Origin for lux

C20: from Electrolux, a vacuum-cleaner manufacturer

British Dictionary definitions for lux (3 of 3)

Lux.

abbreviation for

Luxembourg

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for lux

lux

[ lŭks ]

Plural luxes luces (lōō′sēz)

A SI derived unit of illuminance in photometry, equal to one lumen per square meter.