Electronic ballast quicktronic qtp fc 1x55220 240 for t5 ring tube osram supply voltage 230240 v power frequency 0 5060 hz mains voltage 198254 v for usage in emergency lighting systems in accordance with en 50172din vde 0108 100 same light current with direct and alternating voltage battery voltage may decrease down to 176 v ignition may be above 198 v bulb start start with optimal coil preheating within 15 s automatic safety shut down with defective bulb and at the end o