Busch-Jaeger Busch-Wachter DualLINE 6813/11 Series Operating Instructions Manual page 73

33 ENG
The value last set (on the "Lux" potentiometer or through the
hand-held IR transmitter) is valid.
If the brightness of the outside light exceeds the light value that
has been set, the room light will be switched off.
It will be switched on again depending on the selected operating
mode ("semiautomatic" or "automatic").