Compact fluorescent ballast, ballast type electronic, ballast family LumaPro, lamp type CFL, start type programmed, voltage 120/277, input watts 56, number of lamps 1 or 2, ballast factor 1, power factor greater than 0.97, min. starting temp. -17 degrees C, base type 4 pin, length 4-15/16 in., height 1 in., width 2-3/8 in., wiring type series, light output normal, special features dual connector, number of F26DBX lamps 1 or 2, number of F32BX lamps 1, number of F42BX lamps 1.