Solar Dock Lights - Solar Dock Post Lights - Heavy Duty Long Lasting Solar Powered Outdoor Marine Dock & Deck Lights (2pk SQUARE post lights) High Quality - LED light source lasts for years - No Electricity needed! 18 Hour Run Time on Full Charge - 10 Lumens - Fresh Water Rated - Simple to install ROUND Base fits: 1-5/8" OD 1-7/8" OD 2" OD 2-3/8" OD 3-1/4" OD & Brock Dock Post Covers SQUARE Base fits: 2x2"sq. 2x2" 5-Sided Square & Brock Dock Post Covers RECTANGLE Base fits: 1-1/2" x 2" Rectangle & Brock Dock Post Covers