Proprietary exclusive OttLite ClearSun LED reduces eyestrain by 51%. Provides smooth, uniform light with Color Rendering Index (CRI) of 95+ for excellent color accuracy. 3 color temperature modes (warm light, bright white and ClearSun natural daylight). 3 brightness settings and touch activated controls. Smart digital display features calendar, time, alarm and ambient temperature. Height adjusts from 12 to 19 inches. Base measures 2.625 x 3.1875 inches.