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What is Extraction Efficiency ?

Brillianz Electronic Systems has Brillianz Electronic Systems has a passion to help anyone understand further lighting terminology. With that in mind please find the explanation of Extraction Efficiency...
Light produced by the source - which might be a lamp (halogen, metal halide, fluorescent) or an LED
light emitter – does not all escape from the fixture – some is absorbed by reflectors, lenses,
metalwork – even the lamp itself will reabsorb light reflected back onto it. The extraction efficiency
is the ratio of light emitted from the fixture to the light emitted by the lamp or LED emitter.

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