Beleuchtungsstärke

Beleuchtungsstärke is a photometric measure that quantifies the amount of luminous flux incident on a surface per unit area. It is defined as the illuminance received by a surface from a light source. The SI unit for beleuchtungsstärke is the lux (lx), where one lux is equivalent to one lumen per square meter (lm/m²). This means that if a surface receives one lumen of light spread evenly over one square meter, its beleuchtungsstärke is one lux.

Beleuchtungsstärke is a crucial parameter in lighting design and is used to ensure that spaces are adequately illuminated for their intended purpose. For instance, different tasks require varying levels of beleuchtungsstärke. Reading typically requires higher illuminance than simply walking through a room. Standards exist for recommended beleuchtungsstärke levels in various environments, such as offices, schools, and public areas, to promote safety, comfort, and productivity.

It is important to distinguish beleuchtungsstärke from luminous intensity, which measures the light output of a source in a specific direction, or luminous flux, which measures the total amount of visible light emitted by a source. Beleuchtungsstärke specifically describes the illumination *on* a surface, taking into account both the light source's output and the distance and angle at which the light strikes the surface. Factors like the reflectivity of the surface and the presence of obstructions can also affect the measured beleuchtungsstärke.