The lumen (symbol: lm) is the unit of luminous flux, a measure of the perceived power of visible light emitted by a source, in the International System...

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...

(symbol: lx) is the unit of illuminance, or luminous flux per unit area, in the International System of Units (SI). It is equal to one lumen per square metre...

photometry, the lumen second (lm⋅s) is the unit of luminous energy in the International System of Units (SI). It is based on the lumen, the SI unit of luminous...

Illuminance = luminous intensity × solid angle / length2 Illuminance Lumen (unit) Lux Photometry (optics) Light Parry Moon. "System of photometer concepts"...

Lightness (color) Luma, the representation of luminance in a video monitor Lumen (unit) Radiance, radiometric quantity analogous to luminance Brightness, the...

Lumen Technologies, Inc. (formerly CenturyLink) is an American telecommunications company headquartered in Monroe, Louisiana, which offers communications...

uniform 1 candela source emits 12.6 lumens. For the purpose of measuring illumination, the candela is not a practical unit, as it only applies to idealized...

sometimes ft-c) is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting...

openings. They incorporate an endotracheal lumen which terminates in the trachea and an endobronchial lumen, the distal tip of which is positioned 1–2 cm...