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Luminaire EfficiencyThe ratio of lumens emitted by a light fixture to the lumens emitted by the lamp(s) installed in that fixture. A luminaire with 0.8 efficiency is considered high whereas an efficiency of 0.6 is considered standard.
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Luminaire EfficiencyThe ratio of the light emitted by the luminaire compared to the light emitted by the enclosed lamps. Luminance: At a point and in a given direction, the luminous intensity in the given direction produced by an element of the surface surrounding the point divided by the area of the projection of the element on a plane perpendicular to the given dire [..]
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Luminaire EfficiencyThe ratio, expressed as a percentage, of the light output of a luminaire to the light output of the luminaire's lamp(s). Luminaire efficiency accounts for the optical and thermal effects that occur within the luminaire under standard test conditions.
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Luminaire EfficiencyThe ratio of total lumen output of a luminaire to the lumen output of the lamps, expressed as a percentage.
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