Warehouse-Lighting.com’s Fulham Pony rapid-start
120V electronic ballast is for 1-2 x F21T5s. This ballast has a power factor of
0.509-0.543 and a ballast factor of 1.004-1.135. Minimum start temperature is
32 degrees Fahrenheit. We usually ship this item within seven to 10 business
days, and it includes a three-year warranty.