In the context of light measurement, what is lumens a measure of?

Lumens are a measure of total light emission produced by a light source. This unit quantifies how much visible light is emitted in all directions from a light source, reflecting its overall output regardless of how concentrated or diffused that light may be. When designing lighting for spaces, understanding lumens helps in assessing how much light is necessary to achieve desired levels of illumination for tasks or environments, ensuring sufficient visibility and comfort. The focus of lumens on total light output distinguishes it from other measurements like intensity, quality, or level of brightness, which may involve more specific contexts or parameters.