LED, UV-FREE, FULL SPECTRUM LIGHT - Mimic bright sunlight to help you feel energized, focused, and revitalized, fighting effects of winter blues, jet lag, and seasonal time changes. Provides the recommended 10,000 LUX brightness for effective light therapy, also filters out UV rays to protect your eyes. STEPLESS DIMMING: You can touch the button for 4 Brightness levels 15%-30%-60%-100% for your preference. Or long press ON/OFF button to activate stepless dimming for more choices for maximum comfort. TIMER FUNCTION - Choose timer settings from 10 mins, 20 mins, 30 mins, OFF function. you can control the length of your light therapy session according to your needs.