Compact fluorescent ballast, ballast type electronic, ballast family LumaPro, lamp type CFL, start type programmed, voltage 120/277, input watts 30, 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., wireing type series, light output normal, special features dual connector, number of F13BX lamps 1 or 2.