ROBERTSON 3P10027 Fluorescent mBallast for 1 F6T5 or F8T5 Linear Lamp, Preheat Start, 120Vac, 60Hz, Normal Ballast Factor, NPF, Model 08 /A Offering the broadest ballast/LED Driver line available on Amazon. Selections to match any lighting application. Take advantage of Robertson's 60 years of electronic design and quality manufacturing experience. Robertson warrants product will be free from defects in material or workmanship from date of manufacture when properly installed and under normal conditions of use. Go to RobertsonDirect.com for complete technical data.