Features: 1. Treat seasonal affective disorder mainly used for depression emotional disorders long-term living indoors people who rarely touch the sun. 2. Simulated natural lightcolor temperature can be adjusted between 3000-6500K light intensity within 35000LUX. 3. Eliminate the production of melanin reduces eye fatigue make brain more awake and active. 4. 10 gears dimming with memory function adjust the brightness and color temperature freely. 5. Timing function design 15/30/45 minutes help boost your mood increase concentration and restore energy. 6. No ultraviolet ray it also can be used for photography fill light. 7. Use voltage 5V it can be charged by mobile phone charger power bank computer etc. Specification: Item Type: Lamp Material: Plastic Color: White Light Intensity: Maximum Brightness Over 5000-35000LUX Color Temperature: 3000-6500K Can be switched freely White Light + Warm Color + Mixed Light can be adjusted Energy Adjustment: 10 gears dimming light intensity can be adjusted freely in 5000-35000LUX not limited to gear Timing Function: 15/30/45 Minutes Luminous Range: 130 * 90 Item Size: As Pictures Show Package List: 1 * Lamp 1 * USB Cable