This light therapy lamp delivers a whole spectrum of light with an intensity of 10,000 lux, effective light therapy against winter depression, circadian sleep disorders, fatigue, and shift work. Powered by a USB type C cable; built-in automatic timer from 15 to 60 minutes in 4 sessions (15/30/45/60 minutes); the integrated 3-mode color temperature (warm/warm white/white) and the adjustable brightness (2000 - 10000 lux). You can change temperatures and brightness by pressing the touch control button to create the most comfortable environment. So let the warmth of natural light feel on cloudy days and keep your mood happy!