The S1G is designed to enhance safety and appearance of any dock, deck, gangway or walkway. It features an ultra thin design, made of high impact polycarbonate, which lowers any risk of tripping. It also features high quality LED and is powered by a the latest in lithium battery design. The S1B can run several nights on a single charge. It is also completely waterproof. The S1 is proven to be hurricane tough!