Measurement of light output, one lumen is equal to the amount of light emitted by one candle that falls on one square foot (or meter) of surface located one foot (or meter) away from one candle.
Merriam-Webster Online Dictionary
lumen (noun)1.
the cavity of a tubular organ or part - the lumen of a blood vessel
2.
the bore of a tube (as of a hollow needle or catheter)
3.
a unit of luminous flux equal to the light emitted in a unit solid angle by a uniform point source of one candle intensity
Lumen (Wikipedia)
Look up lumen in Wiktionary, the free dictionary.
Lumen may refer to:
- Lumen (unit), the SI unit of luminous flux
- Lumen (anatomy), the cavity or channel within a tubular structure
- Lumen (band), a Russian rock band
- Lumen (branding agency), a design and branding company headquartered in Milan, Italy
- The Lumen (Cleveland), a skyscraper in downtown Cleveland
- Lumen (website), a database of Digital Millennium Copyright Act takedown requests
- 141 Lumen, an asteroid
- Lumen Martin Winter (1908–1982), American artist
- Lumen metabolism tracker, a health and wellness product
- Lumen Pierce, a fictional character in the television series Dexter
- Lumen Technologies, telecommunications company formerly known as CenturyLink
- Stellar Lumens, a cryptocurrency and payment network
- USS Lumen (AKA-30), a US Navy ship
- Lumen (dating app), a dating app for people over fifty
- Lumen, an office building in Warsaw, Poland, part of Złote Tarasy complex
- Lumen (novel), an 1887 novel by Camille Flammarion
Lumen (Wiktionary)
English
Etymology
Borrowed from Latin lūmen (“light, an opening”). Use as a unit was first adopted by French physicist André Blondel in 1894.
Pronunciation
- (Received Pronunciation) IPA(key): /ˈluːmən/
- (General American) enPR: lo͞oʹmən, IPA(key): /ˈlumən/
- Rhymes: -uːmən
- Hyphenation: lu‧men
Noun
lumen (plural lumens or lumina)
- (physics) In the International System of Units, the derived unit of luminous flux; the light that
brightness, light output, illumination, radiance, luminous flux