Electronic Ballast with highest CELMA energy efficiency index A2 BAT. It offers a large temperature range, intelligent voltage guard, precise lamp operation using adjustment of lamp parameters, advanced SMART-Heating for minimum 50000 starts without replacement of lamps and constant luminous flux irrespective of fluctuations in mains voltage. It is designed for THD <10%, luminaires of protection class I and protection class II, automatic start after replacement of defective lamps, Insulation Displacement Connection (IDC) terminal for rapid automatic or manual wiring and for emergency lighting systems as per EN 50172.