Although many people might consider calculating the lighting level a fad, it is rather a necessity given the importance of light in an interior space. The amount of light required per square meter is measured in lux (lx), 1 lux being equal to the illumination produced by a luminous flux of lumen (lm) that falls uniformly on the surface of 1 square meter. Therefore, it is necessary to know the size of the hallway to know how to properly illuminate. As a rule, the average lighting level for hallways is 75-100 lux per square meter.
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