METHOD AND ARRANGEMENT FOR CONTROLLING LIGHTING BASED ON USER TRACKING

A method and device are provided for controlling the light emitted by a light source. The light is set (303) to an active level in response to a triggering event (302) indicating presence of a user. A timer is started (304) and run until expiry to measure a period of time until the light is to be set to a passive level. If the timer expires (305) without any new triggering event (306) having been observed, the light is set (301) to said passive level. An external control signal received (307) while the timer is running and indicating presence of a user elsewhere changes (308) the time remaining until expiry of the timer. After having received a plurality of such external control signals, different sources of external control signals are associated with specific amounts of time by which the time remaining until expiry of said timer will be changed. Next time when an external control signal is received (307) while the timer is running, the time remaining until expiry of said timer is changed (308) by an amount associated with the source from which the external control signal was received.