A genuine Light Rail, quality constructed in the USA and made to last and that is under continuous use. Only Light Rail performs over many years like a workhorse with the power and endurance for any grow light weight. Beware of cheaply made imitations. The 34″ x 30″ (86cm x 75cm) RoboBar (patent pending) consists of two outriggers, one center bar, two heavy duty T-bar connectors, and four corner eye screws for hanging any grow light. Special security features include two individually secured Nyloc connectors to the Motor. To eliminate swinging to the large, flat plane of an LED, there is also the special design feature of triangulated, acute angled hanging points. This provides sway-proofing as the LED moves along the Rail. And, it positions the LED grow light closer to the Motor, which is a vertical space saving feature. For an overview of hanging, use the four hanging points of your LED grow light to directly match with the four hanging points of the RoboBar. So, an angled, triangulated connection is likely. Note: If your LED grow light came with just two adjustable rope ratchets or cables for hanging, then purchase two more (hardware store, grow light company) so that there is a rope ratchet or cable for each corner. If your LED grow light came with any other instruments for hanging such as metal wire harps to create two centered hanging points only, you will not use those. Four hanging points are what is needed to use the RoboBar and four hanging points will also give the extra stability needed for the flat plane of any large, moving LED grow light. Note: Will work with Add A Lamp Kits (purchased separately) by attaching RoboBar-to-RoboBar for up to three grow lights moved inline per Motor. For space planning, the adjustable Switch Stop stopper to Switch Stop stopper setting might be 3′ to 4′ for stopper placement to light up to a 7′ to 8′ space, depending on grow light dimensions. Solidly made in the USA.