The Thompson arc lamp updates and elevates the look of a classic arc lamp style. A large, wide modified drum shade is comprised of an elegant-looking textured white linen which is accompanied by a smooth white linen diffuser. A brushed steel finish is complemented by a chunky white marble base. A 3-Way rotary switch on the pole controls light output of a 150 Watt bulb. The 3-way rotary socket switch will only work with a 3-way light bulb, otherwise this lamp will function with simple on/off switch at its highest setting.