Universal Electronic CFL Ballast 120V to 277V for 18W to 21W

Universal Electronic Programmed Rapid Start Mult-E Ballast Kit (Optional Back Plates, Wires, Punch Tool) Ignites One or Two 4-Pin Compact Fluorescent or Circline/2D Lamps of 18-21 Watts of 120-277 Voltage.Brand UniversalInput Volts 120-277Input Watts 22-43Number of Lamps 1/2Ballast Factor 95-105%Ballast Type ElectronicLength (in) 4.6Width (in) 2.3Height (in) 1Power Factor 95-98%Total Harmonic Distortion (THD) <15%Lamps by Wattage 1x18W-21W, 2x18W-21WBallast Lamp Type 4-PinStart Type Programmed