The Ott-Lite Revive LED Floor Lamp provides smooth, uniform light with a Color Rendering Index (CRI) of 95, reducing eyestrain by up to 51 percent. The maximum lumen output of 675. Touch activated control with three brightness settings. Three adjustable knobs for precise positioning of light. Height adjusts from 45 inches to 60 inches. Base diameter 10.5 inches. Exclusive energy-efficient LEDs rated to last up to 40,000 hours. Matching table lamp available. Ott-Lite proprietary Wellness Series LED. Comes with an AC/DC adapter (Input: AC100-240V, 50/60 Hz, 0.5A. Output: 24V DC, 700mA with a Male DC plug). Can only be used in the US and Canada.