4 COLOR MODES & 5 BRIGHTNESSThis book light has 4 color modes: white color(6000K), mixed color(4000K), yellow color(3000K), amber color(1300K), and each color has 5 different brightness levels you can easily adjust the light color and the brightness you need. Perfect reading light for different reading environments BLUE LIGHT BLOCKWith gentle amber hue light design book light for reading in bed can block 99.95% blue spectrum light and prevent strains to your eye. On the other hand, reading lights for books in bed can provide a perfect sleep for you by promoting the adequate production of melatonin EYE-PROTECTION CLIP LIGHTNewly health care reading light with 5 brightness levels and amber light mode, providing humane adjustable reading brightness, to a large extent relieve eye fatigue. Without glare, shadow, flicker, or negative radiation, the light is gentle when you read, making your eyes comfortable and healthy LIGHTWEIGHT & PORTABLECompact design makes it easy to take everywhere. It can be easily placed in a pocket or purse. Very suitable for use as a book lamp, bedside lamp, table lamp, indoor or outdoor reading lamp, for camping, night reading for children, headboard reading, learning, DIY tasks PARAMETER DESCRIPTIONSupply with built-in 1100mAh battery and Type-C USB charge cord. Just takes 1.5-2 hours to fully charged the light and the four indicator lights will all turn to blue. The book light can work 60+ hours (low brightness),7 hours (high brightness)