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Indoor lighting in crowded areas

Generally speaking, this area refers to corridors, but circulation areas are often part of large buildings. No matter where it is, in order to help people move in the desired direction, such places should be properly illuminated. Although it is the purpose of this area lighting design to increase the ground illumination of a large area to guide the main direction of activities, this method is not very effective when most people move in the direction of guidance. Vertical illumination should be increased to form a brightness contrast between the ceiling and the ground, so as to help the eyes determine boundaries and directions. Indoor luminous road signs installed in general lighting systems or local lighting systems are also a more obvious way to guide direction and position, but they can only be used when the lights set around are sufficient to ensure the safe movement of people traveling in the passage. Especially in industrial sites, because small electric vehicles and pedestrians must use these passages at the same time, special attention should be paid to safety.

Limiting glare is important for lighting stairways and hospital corridors, but patients in hospital corridors are lying on stretchers, so it is useless to design according to the glare index calculated by the glare table of the lighting association, because the calculation of the lighting association is assumed to be on the horizontal line of sight, so the glare limit in hospital corridors must be calculated according to the formula of the Building Research Institute (BRS).

Emergency lighting is often necessary for indoor traffic arteries, and the location of the lights should be determined by the doors or other exits of the building. Because the eyes need a period of adaptation when they suddenly find themselves in a very low illuminance from a very bright environment, the critical illuminance value of emergency lighting should be at least 1% of the normal illuminance.

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