Lumens, also known as lm, is an important term used to measure the amount of visible light produced by a light source. Lumens act as a gauge for the amount of brightness an LED or other light source can produce. This measurement is important for determining if a light source is going to be fit for the purpose it is being implemented. For example, a powerful enough light source may be needed to read wherever it is being implemented. The lumen measurement has become an important aspect of how lighting is being used to create artificial environments in homes, work places and much more. As the demand for efficient lighting is rising, the lumen measurement is being used to measure light output against power draw. This allows for a more effective use of energy when lighting a room, which is important since lighting takes up such a large percentage of energy use in a dwelling. In conclusion, lumens are an important piece of the puzzle when it comes to efficient lighting. They provide a measure of the amount of light output from a source and are important in determining the amount of energy being used to light a given area. The popularity of lumens when it comes to measuring light output has increased as more attention is being paid to energy efficiency, and as a result, lumens have become an important factor when lighting any space.