This lamp is very convenient to read at night. The rod can easily move the beam so that the gripper holds base firmly in place on the book. It does not dazzle too when illuminates a book and does not illuminate the entire room at the same time. One positive is that it works with AAA batteries which are included. It is easy to change them, which is not necessarily the case for the tube 2 or 5 as found in supermarkets and which operate with button cells. By cons, it is a bit heavy as the medium on which it is fixed (soft cover book with little or pages) but for now the only negative I found him.