3 Color Temperatures & 5 Levels of BrightnessHIBOITEC Sad Lamp provides 3 color temperature modes from 2800K to 5700K, namely warm light, natural light and white light, which can be used as work, daily reading, writing, sleep lighting, to meet all different 5-level adjustable brightness from 10% - 100%, you can adjust the comfortable light according to distance, environment and light sensitivity, making your mood more relaxed and comfortable on dull days. Sleep Quality ImprovementAccording to a large number of experimental studies, has proved that light therapy can improve sleep quality, maintain energy, enhance concentration, make you feel refreshed, and let HIBOITEC light therapy lamps accompany you through this dull and depressing winter Smart Memory Function and 4 Timer SettingsThis Sad Light has 4 optional timers 15/30/45/60 minutes, after the timer is completed, the light will automatically turn off. Ideal for bedtime readers to set the right lighting time for their needs. In addition, the built-in intelligent memory function keeps the last appropriate mode by default when the light is turned on next time. UV-Free Natural LightSunlight Lamp provides 10,000 lux of safe and natural brightness, anti-glare and no radiation, zero damage to your eyes Therapy Lamp can create a sun-drenched interior that can help treat seasonal depression, low mood, sleep disturbances, fatigue, shift work, and jet lag, making your winters less dark and depressing. Unique Art DesignSad Lamp can also be used as decoration due to its unique appearance art design, This will be a Christmas and birthday gift for friends or family, you can put it on your desk, writing desk, living room, The bedside table, or anywhere. If you have any questions, please feel free to contact us, our products provide a lifetime warranty, buy with confidence. Product