Make a healthy choice for your eyes with the Adjust LED Desk Lamp with ClearSun LED Technology – proven to reduce eyestrain by up to 51%. This modern two-tone design in matte black and silver finish fits perfectly anywhere in your home or office. Big on features, you’ll enjoy a flexible neck, three color temperatures (ClearSun natural daylight, bright white and warm white), multiple brightness settings and a 5V, 2.1A USB port to fully and quickly charge your devices. Details: Matte black with silver finish 6" base diameter Height adjusts from 3" to 22" Includes 5V, 2.1A USB port to fully charge smart phones and tablets Maximum lumen output of 420 Proprietary, exclusive OttLite ClearSun™ LED – reduces eyestrain by 51% Provides smooth, uniform light with Color Rendering Index (CRI) of 97 3 color temperature modes Memory feature remembers your last setting for color temp 3 brightness settings with touch controls Super flexible neck holds position to direct light right where you need it Metal design features large dome shade and two-tone look Energy efficient LEDs rated to last up to 40,000 hours