total luminous flux

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• Luminous flux — In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying sensitivity of… …   Wikipedia

• Luminous efficacy — is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power. Depending on context, the power can be either the radiant flux of the source s output, or it can be the total electric power consumed by… …   Wikipedia

• luminous efficiency — noun : the ratio of the total luminous flux radiated by any source to the total radiant flux from that source commonly expressed in lumens per watt …   Useful english dictionary

• Luminous intensity — In photometry, luminous intensity is a measure of the wavelength weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.… …   Wikipedia

• Flux — This article is about the concept of flux in science and mathematics. For other uses of the word, see Flux (disambiguation). In the various subfields of physics, there exist two common usages of the term flux, both with rigorous mathematical… …   Wikipedia

• flux — /flʌks / (say fluks) noun 1. a flowing or flow. 2. the flowing in of the tide. 3. continuous passage; continuous change: to be in a state of flux. 4. Pathology a. an abnormal or morbid discharge of blood or other matter from the body. b.… …  

• Radiant flux — In radiometry, radiant flux or radiant power is the measure of the total power of electromagnetic radiation (including infrared, ultraviolet, and visible light). The power may be the total emitted from a source, or the total landing on a… …   Wikipedia

• luminousefficiency — luminous efficiency n. The ratio of the total luminous flux to the total radiant flux of an emitting source. * * * …   Universalium

• Candela — This article is about the unit of luminous intensity. For other uses, see Candela (disambiguation). Photopic (black) and scotopic[1] (green) luminosity functions. The photopic includes the CIE 1931 standard[2] …   Wikipedia

• Lambert's cosine law — See also: Lambertian reflectance In optics, Lambert s cosine law says that the radiant intensity observed from a Lambertian surface or a Lambertian radiator is directly proportional to the cosine of the angle θ between the observer s line of… …   Wikipedia

• Lumen (unit) — The lumen (symbol: lm) is the SI unit of luminous flux, a measure of the perceived power of light. Luminous flux differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying… …   Wikipedia