what does lumens mean
What Does Lumens mean. The technical definition of lumen is as follows; A lumen is the standard measurement for a unit of luminous flux, it is a measure of the perceived power of light.hat's because watts and lumens measure two very different things. A watt is a unit of electrical energy in other words, input. A lumen is a measure of light intensity output. More simply a light bulb uses watts to make lumens.