FIELD: physics, control.
SUBSTANCE: invention relates to controlling the level of light in building illumination. The result is achieved due to that the level of light is controlled by a control system (2), which is operably linked to at least one interior sensor (3) for detecting the interior level of light; at least one electric light control device (4); at least one window drapery control device (5) for controlling the allowable level of daylight; and a processing unit (7) for processing given control values, which include a given value of the interior level of light. The level of electric light and the allowable level of daylight are controlled concurrently by the electric light control device and the window drapery control device.
EFFECT: providing an automatic power-saving system for controlling building illumination.
10 cl, 10 dwg
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