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a)

b)

c)

Figure 9.3 - Types of artificial illumination

Artificial illumination is divided into working, emergency, evacuation, security
and telltale light according to the purpose.

Working illumination facilitates the industrial process, people movement,
transport movement and is necessary for all industrial buildings.

Emergency illumination ensures work continuation when switching on
working illumination can cause an explosion, fire or poisoning.
The minimal illumination of working surfaces under emergency illumination
has to be 5 % of working illumination, but no less than 2 lx.

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