... electronic ballast 40w,electronic ballast for fluorescent lamp CE,SAA,CB,SGS,A/12997EA,A2 CE,SAA,CB,SGS T5 electronic ballast, ... block2.Active high power factor correction3.Preheat start,long lamp life4.Abnormal protection circuit5.Automatic shutdown of defective lamps( ... lamps7.Low input voltage of repalcement lamps8.Intelligently detect lamp type,one for multilamps9.Suitable for use in emergency ...