USB book light with energysaving LED illumination; USB powered and easy to charge via standard USB sources. Eye protection design with three brightness levels for comfortable, strain lighting during reading, studying, or desk work. Versatile USB lamp suitable for multiple spaces including bedroom, living room, stairs, study, and general office use. 3 gear adjustable brightness provides eyefriendly light for different tasks, from gentle reading to brighter task illumination near a notebook or computer. Practical for reading books and for activities at night at a desk or with a notebook computer, serving as a convenient night light as well. Use scenarios: Night reading in bed or on a sofa: soft, eyefriendly light that avoids disturbing others. Studying or working at a desk or with a laptop: adjustable brightness for clear visibility and reduced eye strain. Dim hallway, stairs, or living room corners: unobtrusive lighting to improve safety and ambiance without loud or harsh lighting.