ROBERTSON 3M10081 S7927RC /A mBallast, Fluorescent, NPF, 277Vac., 60Hz, (1) 7/9TT V1 Save and order the 2M10081 Quik-Pak of 10 units individually packaged Save the most with the 5M10081 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.