Luminance

Diagramm zur Darstellung von Lichtstrom, Lichtstärke und Beleuchtungsstärke von Lampen.

Luminance is abbreviated with the symbol L and refers to the impression of brightness that the human eye perceives from a self-luminous or illuminated surface. This quantity is measured in the unitCandela measured and expressed per square meter (abbreviated as cd/m²).

Yet it is one of the few units of measurement in the field of lighting that we actually perceive as such. Other units of light, on the other hand, usually indicate something that, while true, is perceived differently by us because light is always dependent on the surroundings and other conditions—after all, our eyes don’t see just that one lamp. From thisReason Luminance also depends very heavily on theReflectivity depends on.

In rooms, and especially in the workplace, it is important to ensure that the luminance levels of lamps do not vary too much. Otherwise, vision may be negatively affected, since we perceive contrasts only because they result from the luminance of objects and the luminance of the surroundings, which are influenced by artificial light.

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Luminance

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