Multi-Volt ProLine Electronic CFL Ballast Ballast Start Type Programmed/Rapid Input Voltage 120 to 277V AC Number of Bulbs Supported 2 Max Bulb Watts 13 W Compact Fluorescent Ballast Bulb Type 4-Pin (GX24q) (G24q) (2g11) Bulb Base Type Dimming No Dimming Type No Dimming Dimming Method No Dimming Dimming Range No Dimming CA Title 20 Compliant No -20 Degrees F Min Starting Temp 104 Degrees F Max Operating Temp Thermal Protection Class P