Tired of searching for your dock at night? Brighten and make it stand out with Solar Dock Post Lights! During the day, the solar panel collects the sun's energy and charges the easily replaceable, but long-lasting batteries. At night, Solar Dock Lights' sensor automatically turns on the super bright LED. With multiple units your dock will provide an elegantly lit pathway. This unit is hands free and energy efficient. Run time is 18+ hours on a full charge and is significantly brighter and of much higher quality than conventional solar garden lights. Simple to install in just minutes!