Better light: sun lamp simulates the full spectrum light of the sun without UV light to protect your eyes. Light with an intensity of 10,000 for effective light therapy to avoid depression, fatigue, concentration loss at work, and combat SAD, winter blues and circadian sleep disorders. Dimmable light: This sun lamp offers 3 light colours (white 6,000K, naturally 4,200K and warm 3,000K). The brightness can be freely adjusted to set the exact lighting for you. The different settings can meet your different requirements, so you can adjust your private sunshine. Portable USB: The daylight lamp weighs only 0.4 kg with foldable, non-slip base; powered by a 1.5-m USB type C cable and a 5V 2.5A AC/DC adapter, so it can be connected to a computer/power bank or a surge cube anytime and anywhere. Timer function: With a built-in automatic timer, the lamp can run for 3 periods (10/20/30 min). We recommend a first session of 10 minutes and a gradual increase in daily times until you find a time that is best suited for you. With memory function: To avoid setting every time during use, even when the power is turned off, the user-friendly memory function remembers your preferred settings (light colours, brightness and timer) even when shut down, saving you time and energy.