House Of Troy WS16-31 15-1/2-Inch Swing Arm Wall Lamp, Pewter with White Linen Hardback Shade Adjustable, hinged neck allows for multiple lighting options Uses one 100 watt 3-way incandescent bulb Convenient 3-way switch on lamp socket UL listed in the USA and Canada CA Title 20 Compliant when used with CFL bulb