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Lux

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The unit lux, abbreviated as lx, is used to measure illuminance, which is one of the key units of measurement in the field of lighting. By taking various factors into account—such as light sources and room size—it can be used to determine the brightness in theRoom is calculated. Illuminance indicates how much light or how muchLuminous flux that falls on a specific surface. This is measured using a device called a lux meter on horizontal and vertical surfaces.

However, since the illuminance in lux depends heavily on the position of the light fixture, it is not listed on the light bulb packaging. If a light bulb is very far from the illuminated surface, the lux value is also significantly lower. If, on the other hand, it is very close to that surface, the lux value increases again. It therefore always depends on the placement of the light bulb.

However, for certain areas, there are even regulations regarding illuminance. For example, in workplaces and manufacturing facilities, theDIN EN 12464-1, which states that the level must not fall below a minimum of 500 lux.

Typical illuminance levels in lux include, among others:

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