Dimmable LED Desk Lamp, TILO Eye-care Stepless 3 Dimming Levels Table Lamp with Touch Sensitive Control USB Rechargeable,Adjustable Gooseneck Book Light for Studying,Reading,Camping,Working (White) Sufficient Brightness: 1.5W Power with 20LEDs that give out maximum illumination for 600 lumens(about 380lux with 35CM distance from the light source to the illuminated area). Normally speaking 300-750 lux is suitable for reading, writing, studying etc. Gooseneck: Soft and flexible gooseneck design can extremely adjusting, you can bend and twist it into any way you would like to ensure that you will have the perfect angle. And the hard and heavy base making sure it doesnot tip over when you are adjusting. Touch Sensitive Dimmer: Touch sensitive control with 3-level brightness to be suitable for your favorite activities. 30% brightness lasts 8 hours, 50% brightness lasts 5 hours, 100% brightness lasts 3 hours. USB Charging Cycling: Built in 800mA Li-battery, no longer afraid of a sudden power outage stop. Used as a portable desk lamp after fully charged, or powered by the 5V/1A power adapter (Adapter Not Include). Eye-care: No flickering, no dark area, and no ghosting to protect your vision and reduce eye fatigue.