The Power Up LED Desk Lamp features both Qi-wireless charging and next-generation, ClearSun LED lighting, giving you the total convenience of wireless charging and dramatically reduced eyestrain. Unlike harsh illumination, blue wavelength spikes and computer screens that cause eyestrain, OttLite ClearSun LEDs provide a balanced spectrum - just like the sun - to make seeing and reading easier and more comfortable. It provides smooth, uniform light with color rendering index (CRI) of 97. Maximum output is 400 lumens. Energy-efficient LED is rated to last up to 40,000 hours. This powerful illumination is delivered in a sleek, flexible style with 9" shade, touch controls and dimmability to customize light levels. Neck adjusts lamp height from 13" to 21". Charge your Qi-enabled device wirelessly on the lamp base or through the 5-volt, 2.1A USB port.