Sylvania 49429 2 Lamp T8 instant start ballast. The QHE 2x40DL/UNV ISN is 120/277 volt, high efficiency, normal factor for FT40DL fluorescent ballast.
SYLVANIA QUICKTRONIC High Efficiency (QHE) 59IS ballasts operate OCTRON® FO96 T8 lamps with maximum efficacy and high-lumen output and provides 30%-50% energy savings when compared to F96T12 magnetic systems. New small can enclosure on select models allows for low profile fixture design and application. These ballasts are also RoHS compliant and feature lead-free solder and manufacturing process.