The brightness of a light fixture is measured in lumens. Lumens measure the amount of light that is emitted from a source. The higher the lumens, the brighter the light. The amount of light emitted by a LED fixture is determined by the number of LEDs and the power of each LED. Our commercial-grade LED flood fixtures have a lumen output ranging from 1695 lumens on the low end to 35400 lumens on our largest 300-watt fixture.