ROBERTSON 3M10570 0683 /B mBALLAST, NPF, 120Vac., 60Hz, (1) F8T5 Offering the broadest ballast/LED Driver line available on Amazon. Case Style 1F Take advantage of Robertson's 60 years of electronic design and quality manufacturing experience. Commerical grade. Two year warranty. Go to RobertsonDirect.com for complete technical data.