Copper Top Solar LED Light Post Caps - 4" x 4" Light up your bridge day and night with our Solar LED Post Caps. By day, these post caps add a charming touch to your bridge, porch, fence, or any outdoor area. By night, they enhance your bridge with lovely accent lighting-without the hassles of wiring or electricity! Can be controlled with ON/OFF switch Two LED lightbulbs plus reflective panel make the solar light four times brighter (Click on " View Enlarged Image" under picture to see night photo) Two AA Ni-Cad Rechargable Batteries ensure longer lighting power up to 12 hrs of light Will fit on any 4" x 4" post only. The outside dimensions of a normal 4" x 4" measure 3 5/8" x 3 5/8" No Wires, No Electricity, & No Hassles! Use them on fences, decks & porches, along walkways and driveways, to highlight retaining walls, or anywhere else you need light! Easy to install and maintain Light up your deck or porch day and night By day, these post caps add a charming touch to your deck, porch, fence, or any outdoor area By night, they enhance your home with lovely accent lighting-without the hassles of wiring or electricity Pressure Treated Wood Base Trim can be stained or painted (by you) to match the color of your current decking material. Note: These lights are plastic with a thin film of copper on them. They are not solid copper.