5 Brightness Adjustable This small reading light has 5 brightness levels available, you can choose the most suitable level for your eyes. You can set your favorite brightness as default with the book lights for reading at night. Plus, there are 5 LED beads scientifically installed so the light can be evenly distributed on reading pages. It is bright enough to illuminate the full pages, while it is dim enough not to disturb others nearby. No flickering, nor harsh light. 3 Color Modes & Eye Caring Unlike other book lights, our tiny reading lights for books in bed has 3 different reading modes: amber mode(1800K), breeze mode(3400K), and precise mode(6000K)