What are lumens? A LUMEN is a unit of measurement of light. A foot-candle is how bright the light is one foot away from the source. A lumen is a way of measuring how much light gets to what you want to light. A LUMEN is equal to one foot-candle falling on one square foot of area. A standard 100 watt incandescent light bulb emits approximately 1700 lumens.

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