ROBERTSON 3P10024 Fluorescent mBallast for 1 F14T8 Linear Lamp, Preheat Start, 120Vac, 60Hz, Normal Ballast Factor, NPF, Model OC1420 /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.