BCU integrated into the unit. The 2 channel time switch can be used as a daily or as a weekly time switch. On each channel, switching, priority, brightness values or value messages (commands) can be transmitted at determined times. The time switch offers: 36 captive switching times which are programmable by free block formation on one, several or all weekdays. In addition the device is already programmed ex factory with valid Middle-European switching for automatic summer/winter time switching and actual time.