Attwoods 3 LED Underwater Courtesy Light is perfect for mounting on rails, transoms, and swim platforms. These LED lights exceed the output of comparable halogen lights while using 20% of the power. Lights stay cool to the touch and eliminate the burn hazard that halogen lighting can present. Fully potted electronics and stainless steel housing allow for interior and exterior mounting - even underwater. Rated for 50,000+ hours of life. For 12 VDC systems.