<p>The Timbertech DeckLites LED Post Cap Light Ring delivers a gentle glow around any post. Easily installs under any Timbertech RadianceRail or RadianceRail Express Post Cap.</p><br /> <br /><ul><li>Choose the 4x4 module for RadianceRail Express Post Caps.</li><br /><li>Square-shouldered and grooved boards accommodate both top-down and hidden fasteners</li></ul><br /><li>Choose the 5x5 for RadianceRail Post Caps.</li><br /><li>Post caps and covers sold separately.</li></ul>