Hang your AI lights with the EXT Hanging Kit and one or more EXT Rails of your choice.(sold separately). The EXT Rail System continues AI’s industry-leading core of modularity and elegant design. From mounting a single FiftyTwo or TwentySix, to hanging multiple modules over your tank, the EXT provides a smart, sleek and complete mounting solution. With the included 96 inch cables, the EXT Hanging Kit easily adjusts to any height.