The Adjustable Arc features a counterweighted arm that adjusts up and down to desired height. The spun aluminum shade rotates on a universal ball joint allowing for strong and focused directional light. Shade: Powder-coated aluminum Frame: Chrome-plated steel Tightener Ball: Black plastic Dimmer switch located on cord. Shade Color: Black, Ivory Custom colors available at additional cost. Dimensions: 32” D x 9” W x 16” H adjusts up to 21.26” H 82 D x 23 W x 41cm H adjusts up to 54 cm H Lamp- US/Canada: A19 or A15 60W max. LED bulb: Lemnis Pharox 400 Flame A19, 8 watt Lamp- Europe: E27 GLS 60W Wattage: 60W max Weight: 3 lbs / 1.4 kg David Weeks Studio lighting is custom-made in Brooklyn, New York.