luminous efficacy

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    Knowledge How Stokes Shift Impacts LED Efficiency and Color Quality?

    Phosphor conversion (PC) is the most widely used approach for generating white light with LEDs. The technique involves using a blue LED (InGaN chip) to pump light into a phosphor down-converter. A portion of short-wavelength photons is absorbed by phosphors and converted into longer wavelength...
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    • color quality color temperature luminous efficacy
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    • Forum: LED Lighting
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    Knowledge What is optical delivery efficiency?

    Optical delivery efficiency describes how efficiently light emitted from the light source is delivered for all of the various jobs of the lighting. Optical design plays an important role in deciding the success of a light fixture. To reduce power consumption, the optical efficiency of the whole...
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    Knowledge What is luminaire efficacy?

    Luminaire efficacy is the total luminous flux emitted by a luminaire divided by the total power consumed by the luminaire, expressed in lumens per watt (lm/W). Luminaire efficacy is a product of the wall plug efficiency (WPE) times the conversion efficiency (CE).
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    Knowledge What is wall plug efficiency?

    Wall plug efficiency (WPE) is the efficiency of energy conversion from electrical power (W) to optical power (radiant flux in watts).
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    Knowledge What is luminous efficacy?

    Luminous efficacy is the ratio of luminous flux to applied power and is expressed in output lumens per watt (lm/W). Unless otherwise noted, luminous efficacy indicates the ability of a light source or lighting system to convert electrical power to light perceptible by the human eye. Luminous...
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