LumaPro(R) Electronic CFL Ballast Ballast Start Type Programmed Input Voltage 120 to 277V AC Number of Bulbs Supported 1 2 Max Bulb Watts 18 W Compact Fluorescent Ballast Bulb Type Dimming No Dimming Type No Dimming Dimming Method No Dimming Dimming Range No Dimming CA Title 20 Compliant No -4 Degrees F Min Starting Temp 194 Degrees F Max Operating Temp Thermal Protection Class P