Our suspension lighting system features the brightest LEDs in the world. New 1 watt LED emitters provide a powerful glow in a compact metal housing. The digital controller provides features such as brightness control, strobe, breathing, and many more flashing. The LEDs are mounted inside a comapct metal housing that is shock and waterproof. Each system has 1 digital controler and 4 LEDs. You can even expand your system with the optional LEDs, the SL2, for those installs requiring more light. The SL210 is available in 5 colors - Blue, White, Red, Green, and Orange.