luminous efficiency

American  

noun

Optics.

1. the perceived brightness of light as a ratio of the total luminous flux to total radiant flux of the source; a measure of brightness obtained by dividing the source's luminous flux by the consumption of its energy.

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luminous efficiency British  

noun

1.  V.  the efficiency of polychromatic radiation in producing a visual sensation. It is the radiant flux weighed according to the spectral luminous efficiencies of its constituent wavelengths divided by the corresponding radiant flux

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Example Sentences

The experiment was undertaken in the hope that shaped charges would help answer some important questions in meteor physics, e.g., controlled experiments concerning the luminous efficiency of meteors and other hypervelocity effects.

From Time Magazine Archive

A fair average of the retail values of fuels and of electrical energy and an average luminous efficiency of the light-sources involved have been used in making the computations.

From Artificial Light Its Influence upon Civilization by Luckiesh, Matthew

It is natural to inquire whether or not any mode of light-production now in use has a limiting luminous efficiency approaching the ultimate limit which is imposed by the visibility of radiation.

From Artificial Light Its Influence upon Civilization by Luckiesh, Matthew

This property of selective radiation is possessed by some elements to a slight degree, but if treatment could enhance this property, luminous efficiency would be greatly increased.

From Artificial Light Its Influence upon Civilization by Luckiesh, Matthew

The highest luminous efficiency attainable by pure temperature radiation will be reached when the temperature of a normal radiator reaches the vicinity of 10,000°F. to 11,000°F. The melting-points of metals are much lower than this.

From Artificial Light Its Influence upon Civilization by Luckiesh, Matthew