Book lights are small, portable lights designed to illuminate the pages of a book, making it easier to read in low-light conditions. They often come with adjustable brightness settings and flexible necks, allowing users to direct the light exactly where they need it. Many book lights are powered by batteries or USB, making them convenient for use at home or on the go. These lights are popular among avid readers, especially those who enjoy reading in bed without disturbing others. Some models clip onto the book, while others are freestanding, providing versatility for different reading environments.