This Circle Solar Dock Light is a great addition to any dock, deck, or walkway and is designed to shine light in all directions. Light automatically turns on when it becomes dark outside and can be seen up to 1/2 mile away. Highly reflective light is corrosion-resistant for extended durability. Aluminum construction meets IP68 waterproof rating standards. No maintenance required. 1" x 4-7/8" diameter. 3.6" between mounting holes. Visible up to 1/2 mile away Designed with an IP68 waterproof rating | 360° Circle Solar Dock Lights, 2-Pack, Blue