This is the Tridonic PC 2/70 T8 Pro, a non-dimmable high frequency ballast to run 2 x 70w T8 fluorescent tube. These ballasts have a nominal life time of up to 50,000 hours and provide a constant luminous flux even with fluctuations in mains voltage. Tridonic T8 Pro ballasts also have an automatic start after replacement of defective lamps and a safety shutdown of defective lamps at the end of a lamps life. All T8 pro ballasts are suitable for use in emergency fittings, in line with EN 50172 Tridonic article number: 8700523 Dimensions: L 360mm, W 40mm, H 28mm Click here to see Data Sheet and Wiring Diagrams!