Lighting level
The lighting level is often also referred to as a level of brightness and describes the average illuminance in an entire room or only in certain areas in it. It says how high the illuminance has to be depending on the levels of reflection and the difficulty of visual work, because only if these three sizes fit together can also be obtained a good lighting level. A further application of the lighting level is in the street lighting, since the luminance is used as a lighting index instead of the illumination.
The lighting level is therefore related to the light cast by the light and the reflection properties of the areas in the room. For example, the lower the level of reflection in the room and the more difficult the visual task, the higher the illuminance for a good lighting level. This is because, for example, the walls do not reflect the lights and therefore do not make the room appear brighter, but a detailed work should still be done, which is why the illuminance must be larger and therefore lighter.
Typical levels of reflection include:
Up to 85% reflection on a white ceiling or wall
Up to 50% reflection in light wood
Up to 25% reflection on red bricks
No reflection on a black floor at all
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