This Rocket 4 light canopy track requires a 50 watt GU10 bulb, Finish: Brushed Nickel, Overall Height: 5, 5"": - 23, 5"", Overall Width: 33, 5"", Overall Depth: 5, 5"", Extension: 5, 5"" - 23, 5"", Lighting Type: Complete Track Kits, Installation Type: Ceiling Mounted, Theme: Contemporary / Modern, Number of Tiers: 1, Light Direction: Down Lighting, Shade Shape: Round, Shade Material: Metal, Number of Bulbs: 4, Wattage: 200 W, Bulb Base: GU10, Bulb Type: Halogen, SKU: ARTCL565