Puck lights are small, round lighting fixtures that can be used for various purposes, such as accent lighting or task lighting. They are often installed under cabinets, in closets, or on shelves to provide focused illumination in specific areas. Puck lights can be powered by batteries or plugged into an electrical outlet, making them versatile for different settings. These lights come in various styles and brightness levels, allowing users to choose the best option for their needs. Many puck lights are designed to be easy to install, often featuring adhesive backing or mounting hardware, making them a popular choice for DIY home improvement projects.