What is Luminance

What is Luminance

Luminance is the amount of light that is emitted, transmitted through, or reflected from a surface. It is a measure of the brightness or intensity of light and is typically expressed in candela per square meter (cd/m²) or nits. Luminance is an objective and quantifiable characteristic that can be measured using specialized equipment.

Luminance is used to assess the performance and quality of lighting fixtures, displays, and surfaces. By measuring the luminance of different light sources, one can determine their efficiency and effectiveness in providing adequate illumination.

In architectural lighting design, luminance is used to determine appropriate lighting levels and uniformity. By considering the luminance values of different surfaces and objects, lighting designers can create lighting schemes that enhance visibility, aesthetics, and comfort.

Luminance is distinct from brightness, which is a subjective perception of light intensity by the human eye. While luminance is a measurable quantity, brightness is influenced by various factors, including the luminance of the object, the surrounding environment, and individual visual perception.