Dock Edge Solar Postlite -
Six pre-installed LED colors with built-in toggles let you change colors with the flip of a switch to differentiate your dock from your neighbor’s. Fits 1-5/8", 1-7/8", 2-3/8" and 2-1/4" posts as well as flat surfaces with included adapters. Installs in minutes without wires. Rechargeable, replaceable batteries included. Per 2.