89899927 is a Combined Electronic Ballast and Emergency Lighting Module for compact fluorescent lamps. It features latest ballast technology, intelligent voltage guard (IVG), preheat start in normal operation and cathode heating during emergency operation with TC-D/T lamps. It also offers automatic restart after lamp change in normal operation, 3 hours duration for TC-DD lamp variants, 3 and 1-hour duration for TC-D/T lamp variants, duration selected by jumper plug, reverse battery polarity protected, battery short circuit protected, deep discharge protection, regulated electronic charging circuit, standard brightness and ultra-high brightness (UHB) charge indicator LED available. It is easy to use lightweight one-piece unit, small size, simplified wiring, IDC terminals for automatic and normal wiring, emergency testing by isolating only the unswitched supply and remote battery pack unit.