The Grantham Arc Lamp has a heavily weighted base supporting a gently curved satin steel arc. The natural linen or black with a taupe colored burlap weave shade adjusts vertically. This modern arc lamp is conveniently operated by an on/off foot step switch. Grantham Arc Lamps provide excellent room light from a single 150 watt incandescent or equivalent CFL bulb. The overall lamp depth adjusts from 53.5" to 60", the base measures 12.5" in diameter, there is 61.5" of clearance from the floor to the shade bottom and the shade tapers from 15" in diameter at the bottom to 13.25" at the top.