Definition of lux in English:


Syllabification: lux
Pronunciation: /ləks
(abbreviation: lx)

noun (plural same)

The SI unit of illuminance, equal to one lumen per square meter.
More example sentences
  • Professional curators and conservators will look for work elsewhere, and amateurs will be hired who don't care whether light levels are 50 lux or 500 lux.
  • Light boxes for light therapy usually produce between 2,500 lux and 10,000 lux.
  • It is measured in foot-candles or lux.


late 19th century: from Latin, literally 'light'.

Definition of lux in: