Enjoy a healthier way to see with the OttLite ClearSun LED, an exclusive technology that helps to dramatically reduce eyestrain and glare by up to 51%. Provides smooth, uniform light with Color Rendering Index (CRI) of 95. Maximum lumen output of 400 with touch activated control. Rounded diffuser mimics the look of traditional bulbs. Four brightness settings with touch control. Two adjustable knobs and swiveling joint at shade to provide lighting where you need it most. Includes 5 V, 2.1 A USB port, fully charges tablets, phones and more. Exclusive energy efficient ClearSun LEDs rated to last up to 40,000 hours.