Definition of "lumens" []

• Plural form of lumen. (noun)

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• "Forrest and his coworkers report that the technology emits about 70 lumens from a watt of power."
• "At their brightest setting, they put out 200 lumens, which is insanely bright -- nearly an order of magnitude brighter than a legacy 3D Mag-Lite with brand new batteries."
• "Each light delivers 1,800 lumens, which is equivalent to a conventional 38-W fluorescent security light."