Deep Glow Green Underwater Dock Fishing Light (100 Ft) The World's Premier Manufacturer of Underwater Lighting Simple to install in 15 minutes without getting wet; they can be thrown, dropped or placed in the water and will automatically right themselves on the bottom facing the waters surface Brighter by design - up to 60% brighter by reflecting all of the 10,000 lumens to the surface Environmentally safe and emit ultraviolet, colored light designed to attract a variety of marine life. Built Strong - Deep Glow lights were designed and tested to withstand the rigors of harsh, rough, salt water environments and commercial applications