ROBERTSON 3M10086 SP2PW /A 120Vac. 60Hz Magnetic Preheat Start Normal Power Factor Fluorescent Ballast for 1 CFQ13W/GX23 F20T12 F15T12 F14T12 F15T8 F14T8 Save and order the 2M10086 Quik-Pak of 10 units individually packaged Save the most with the 5M10086 carton of 10 units, not individually packaged Commercial grade. Two Year Factory Warranty Go to RorbertsonDirect.com for complete technical data. Take advantage of Robertson's 60 years of electronic design and quality manufacturing experience.