The tridonic pc 1x4 13 w basic square is a non dimmable basic high frequency ballast to run 1 x 4 watt t5 fluorescent tube or 1 x 6 watt t5 fluorescent tube 1 x 9 watt t5 fluorescent tube 1 x 13 watt t5 fluorescent tube or 1 x 10 watt 2d compact fluorescent lamp tridonic 24138831 click here to see data sheet and wiring diagrams