The 20" Round 17-Port Fast Jack Canopy mounts to a standard 4" electrical box with plaster ring, or to an octogon box. It includes 3 anchors for additional support. Dimmable with standard electronic dimmer. Maximum 20 watt load per port – total of 340 watts. General light distribution. Bubble Ball 17 is available with 10 ft long field-cuttable coaxial cable and includes (17) FJ-MCH (male connector heavy-duty).