LED Underwater Dock Light - 200W - 50' Cord - Green The SF200 underwater dock light features the latest in LED design and technology.  With over 120 lumens per watt the SF200 will maximize underwater illumination, promote energy efficiency and safe operation. The SF200 is designed to be anchored to the bottom at the desired location, shining upward toward the surface.  Each light comes with a 50’ cord.  Extra lengths are optional.  The SF200 is perfect for creating great aesthetics around waterfront dining, marking channels or a great look throughout the marina or private dock.