ROBERTSON 3M10624 SP48 /K mBALLAST, 2 , 120Vac., 60Hz, (1) F4T5 Offering the broadest ballast/LED Driver line available on Amazon. Case Style 2 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.