DEVICE FOR CONTROLLING LIGHT SOURCES

摘要

An illumination system (1) comprises: -at least one light source (2); -a control system (3) for controlling the light sources, the control system comprising a sensor system (4) with at least one light sensor (5) for sensing ambient light (L1) and for generating a sensor output signal (M) representing the sensed light level, wherein the control system is designed for controlling the light sources in relation to the sensor output signal. The control system automatically calibrates the sensor system. The control system measures the ambient illumination level (M_MIN) at a moment of calibration and stores this measured ambient illumination level into a memory (7). The control system, preferably with the light sources in an OFF condition, monitors the ambient illumination level and compares this with the stored value, and automatically performs a calibration procedure when the ambient illumination level reaches a new minimum value lower than the stored value.