Fluorescent Ballast for luminaires of protection class I and protection class II. It offers an intelligent voltage guard (overvoltage indication and undervoltage shutdown), constant luminous flux irrespective of fluctuations in mains voltage, automatic start after replacement of defective lamps, safety shutdown of defective lamps and at end of lamp life, insulation displacement connection (IDC) terminal for rapid automatic or manual wiring, for emergency lighting systems as per EN 50172.