Want light to shine through a neat geometric shape? These Deckorators® Labyrinth Solar Post Caps will do just that! The solar LED post cap fits over a standard 4x4 wood post (inside dimensions: 3-5/8 in. x 3-5/8 in.). They are a modern and stylish way to add soft, wireless lighting to your deck. These post caps are available with a cedar or pressure-treated base.