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+. Three brightness settings and three adjustable knobs provide lighting where you need it most. Rounded diffuser mimics the look of traditional bulbs. Maximum lumen output of 400 with touch activated control. Includes 5V, 2.1A USB port, fully charges tablets, phones and more. Exclusive energy efficient ClearSun LEDs rated to last up to 40,000 hours.