This flush mount celing light from Access Lighting requires one 13-watt compact fluorescent bulb.Bulb Base: GU-24 Bulb Type: Fluorescent Category Group: Flush Mounts Category Sub Group: Bowl Flush Mounts Certification: CETL Collection: Cirrus Diameter: 12-1 4 Energy Star: No Energy Star Compliant: Yes Finish: Satin Glass: Frosted Height: 4.00 Kelvin: 2700k Location: Damp Lumens Per Watt: 69.24 Material: Metal Number of Lights: 1 Shade Material: Glass Socket1 Max Wattage: 13 Socket1 Number Of Bulbs: 1 Style: Contemporary Total Nom Lumens: 900Lm Voltage: 120 Wattage: 13 Width: 12.25