Book light is equipped with 14pcs upgraded SMD LEDs which filters 99.9% blue light to protect your eyes and to reduce your eye strain. Book light for reading in bed has 3 color modes. Whether you like warm or white light, bright or soft, our "whale usb rechargeable book light" can meet your satisfaction perfectly.The dimmable reading light is bright enough for reading, knitting, sewing & craft, or dim enough to not disturb the others.