Abstract: A lighting device comprising, one or more semiconductor light-sources for generating a light beam, at least a motor for rotating said light beam, and a controller for controlling speed of rotation of the motor and intensity of the light-source and monitoring the operating conditions, detecting failures of the lighting device and/or, any of its components and setting off alarms which could be audio/visual and/or, radio or, telecom equipment using land and/or, air and/or, satellite links. The light beam generated by the light-sources is rotated. The light assembly broadly finds application in aviation industry, obstacle beacons, lighthouses and entertainment industry.

Abstract: A signaling system is presented. The signaling system comprises a power supply line coupled to an aspect through a current regulator. The aspect has a plurality of light sources. The current regulator is configured for maintaining substantially unity power factor and for maintaining substantially constant current through the supply line during normal operation of the system. The regulator is further configured for detecting a complete/partial failure of the aspect and communicating an indication indicative of the failure over the supply line by maintaining a significantly different current level through the supply line as against the normal constant current level. A distantly located alarming system is connected to detect partial/full failure of aspect and current regulator by variation in the current flowing through the supply line as against the constant current.