Built specifically for the marine environment, these surface-mount solar lights automatically provide 8 hours of bright light each night—even after a cloudy day. Their innovative lens design directs the light at the dock, piling or post where it is needed for safety and visibility. Both include AA-size NiMH batteries that drive 1.5mAH to the efficient LEDs. Easily switch light output from white to blue or green. Waterproof and shock resistant.The Piling Light fits a square or round pilingGlows blue, green or whiteUp to 8 hours burn timeRechargeable battery included