UV-FREE FULL SPECTRUM LIGHT: Light therapy lamp can deliver up to 20000 lux. Using light lamp during periods when daylight hours are short can regulate sleep, improve mood, boost energy and increase focus.3 COLOR TEMPERATURE: Sun light therapy lamp has 3 color temperatures (White ...UV-FREE FULL SPECTRUM LIGHT: Light therapy lamp can deliver up to 20000 lux. Using light lamp during periods when daylight hours are short can regulate sleep, improve mood, boost energy and increase focus.3 COLOR TEMPERATURE: Sun light therapy lamp has 3 color temperatures (White /Natural/Warm Light ) that you can according to the environment to customize the settings and create a comfortable atmosphere for you.