LEDshift == luminous flux (lm, Lumen) ,light-current, lm, lumens, lm/W, lumen/Watt ==
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Lumen: the energy unit of measure explained
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What are Lumens? | Integral LED
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Lumen to Watt Comparison - Energy vs Brightness
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What is a Lumen? - Definition from Techopedia
Luxend - In simple terms, Lumens (denoted by lm) are a measure of the total amount of visible light (to the human eye) from a lamp or light source. The higher the
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