Tridoinc pc 270 t8 pro the tridonic pc 270 t8 pro is a non dimmable high frequency ballast to run 2 x 70 watt 6ft t8 fluorescent tubes tridonic article number 22176232 tridonic pc 270 t8 pro high frequency ballasts have an average life of 50 000 hours click here to see data sheet and wiring diagrams