Offex Office Ascend LED Swing Arm Lamp for Drafting Table - White Touch and Slide Dimmer. Clamp Mounts Easily to All Offex Tables. Overall Dimensions (standard position): 20.5"W x 16.5"D x 21.25"H Powered by Wall Outlet or USB port. Color: White. LED with 40,000 Average Hours of Life. Color Temperature: 5,000K. Lumens: 350