Busch-Jaeger Busch-Wächter DualLINE 6813/11 Série Instructions D'utilisation page 68

ENG 28
A brief increase of the outdoor light does not immediately switch of
the light. If the operator feels that the light is automatically turned
off too soon/late, a higher/lower Lux value has to be set. Please
ensure that an unwanted turn-off is not caused by a turn-off delay
that has been set too low at the potentiometer.