Durable: Die cast aluminum construction manufactured to be durable and last long. T-Bar Clips are used to attach track to drop grid ceilings or t-bar ceiling frames. WAC H-L-J-J2 track systems can be used with WAC and a variety of other manufacturer's track systems. Please order your track, components and fixtures according to your system's compatibility. WAC track is fully dimmable. Single Circuit 120V track, power per Circuit: 120V, 1920W max per circuit, Operating Current: Rated 20A max. Compatible with H-L-J-J2 track systems by WAC Lighting. Also compatible with H-L-J-J2 systems from other leading lighting manufacturers. Standards: UL & cUL Listed for Dry Locations. Track lighting systems are open conductors and intended for indoor use only.