Fluorescent emergency ballasts are designed to operate most single or bi pin tubular lamps, as well as 2-pin or 4-pin compact fluorescent lamps including Ushaped, HO, VHO, circle line, energy saving, twin-tube, double twin-tube (quad), triple twin tube, long compact and 2D lamps. Long life, high temperature nickel cadmium battery provides a minimum of 90 minute emergency lighting. Dual voltage 120/277volt, 60 Hz input.