2Pk EZ Dock Solar Pocket Lites for Fresh Water EZ Docks Designed for filling empty pockets on EZ-docks in fresh water Made from durable GE Lexan Polycarbonate that can withstand light traffic and walking Integrated solar panel gathers solar energy during the day and powers this solar dock light at night Automatically lights up at night and runs for up to 18 hours at night Easily interchangeable LED to allow for customized and personalized dock lighting