10,000 lux UV-free lamp: This light therapy lamp with an effective brightness of 10,000 lux (full spectrum with UV filter) simulates sunlight and helps combat the winter blues (SAD), imbalances, low Vitamin D, low energy, unmotivated moods. The light is UV-free, so your skin won't be damaged by the sun. Adjustable brightness: Our happy light features 3 brightness levels (50 percent or 75 percent or 100 percent ), interchangeable LED sun lamps at will. They make you feel relaxed and comfortable. 6 timer modes: The built-in automatic timer lets you set the timer mode from 10 to 60 minutes with the touch of a button, so it turns off automatically when you fall asleep or get ready to sleep. Convenient and energy-efficient. Touch control and LED technology: The lamp body is made of high-quality materials, and the LED daylight can last for about 60,000 hours, which is ten times longer than ordinary fluorescent tubes. LED light is flicker-free and glare-free, without flicker or radiation, and can protect your eyes from excessive fatigue. We offer a one-year money-back guarantee and a three-year quality guarantee from the date of purchase.