The Kaleidoscope Lamp Base and Shade uses a 60 watt bulb maximum. An energy efficient light bulb is included. The lamp shade measures 4 inches wide at the top, 10 inches wide at the bottom, and is 6.75 inches tall. The lamp base is 6.25 inches wide x 6.25 inches deep, and is 12.5 inches tall. Lamp has 120 volt 2 prong polarized plug.