The Sure-Lites Lifeway II C Series is a single phase inverter that provides uninterrupted power. This pulse width modulated inverter utilizes IGBT technology and has a 2 millisecond transfer time. The unit’s operating efficiency is 98%, well above a typical fast transfer inverter. The C Series inverter is UL 924 listed and meets NFPA 101 requirements by providing 90 minutes of illumination for emergency egress lighting. Other run times and voltages are available. Please consult your Cooper Lighting Representative.