The tridonic pc 1x5 16 w basic square is a basic non dimmable high frequency ballast to run 1 x 16 watt 2d compact fluorescent lamps or 1 x 10 watt double turn compact fluorescent 1 x 13 watt double turn compact fluorescent or 1 x 5 watt single turn compact fluorescent 1 x 7 watt single turn compact fluorescent 1 x 9 watt single turn compact fluorescent 1 x 11 watt single turn compact fluorescent 1 x 13 watt single turn compact fluorescent tridonic article number tridonic 24138830 click he