The 16" round canopy contains 5, 7 or 9 Fast Jack Ports and mounts to a standard 4"electrical box with plaster ring, or to an octagon box. It includes 3 drywall anchors for additional ceiling support. Halogen version accepts a maximum 12 volt, 50 watt load per port and LED version accepts 40 watt maximum load per port, totaling: 250W (200W LED) for 5-Port, 350W (280W LED) for 7-Port or 450W (360W LED) for 9-Port.