A lumen measurement is a way of quantifying the amount of visible light emitted from a light source. Lumen is a unit of measurement that describes the total amount of visible light emitted from a source, such as a light bulb or flashlight. The higher the lumen rating, the brighter the light. Lumen is an important factor to consider when selecting a tactical light for lighting up dark rooms, as it can determine how much light is needed for an area. For example, if you want to brighten up a living room, you will need to select higher lumen bulbs than if you were lighting a hallway. Knowing the lumen rating of a bulb can also help you determine its energy efficiency. The more lumens, the more energy it consumes. When shopping for bulbs, look for bulbs labeled with lumens to ensure you’re getting the right amount of light for your loadout.