Designed specifically for Circular 16mm diameter (T5) fluorescent lamps this Osram QTP-FC mains voltage ballast will run Single 55W lamps. It is non-dimmable high frequency ECG offering perfect lamp start for applications with motion sensors long lamp life and flicker free start. This product boasts a service life of up to 100000 hours and benefits from separate installations thanks to optional cable clamp for K2 and K3 casings. Suitable for Protection Class 1 luminaires and emergency lighting systems it is also popular for office corridor and public building applications.