We have struggled to find an aluminum black solar light that fits a composite decking sleeves. Wood posts are 4x4, but with composite, closer to 4.25. These 4.5 x 4.5 black aluminum bases Classy Caps TRA45B Base Imperial Aluminum, act as an "adapter". Together with the Classy Caps SL211B Aluminum Imperial Solar Post Cap, 4" x 4" - These work Great!<br /><br />It was on another customer's review that I learned about the Base/adapter plate. We Love the look and lights/adapter. Give a nice ambient lighting.<br /><br />The bases do NOT come with hardware, so we used Wood Screws (8x1/2 flat head) to attach the adapter/base to the post. The screws that come with solar lights do Not work with base...so we used Sheet Metal screws (#6x1/2 hex head) and I spray painted them black in advance.
Rating: [5 of 5 Stars!]