The 11"x 33" linear canopies contain 14 or 17 Fast Jack Ports and mount to a standard 4" electrical box with plaster ring, or to an octagon box. It includes 4 drywall anchors for additional ceiling support. Both halogen and LED versions accept maximum of 20 watt 12 volt load per port, total of 280 watts (14-Port) or 340 watts (17-Port). Halogen version is dimmable with standard electronic dimmer. LED dimming range varies: reference corresponding fixture specification sheet, at www.edgelighting.com, for dimming details.