What does the term "lux" refer to in lighting?

The term "lux" is specifically defined as a unit of measurement that quantifies the level of illumination on a given surface. It is derived from the metric system and corresponds to one lumen per square meter. Thus, when discussing lighting in terms of "lux," it is about assessing how bright an area is and how effectively light is illuminating that space, which is critical in both theatrical and architectural lighting design.

Other terms, like intensity of light or types of light equipment, may relate to lighting in general but do not capture the specific definition of "lux." Intensity refers more to the strength of light from a source, not the measurement of illumination on a surface like lux does. Understanding this term is essential for anyone involved in lighting design, as it helps gauge how well-lit a performance area or stage is, influencing visibility and the overall aesthetic of a production.