This Spike is not compatible with solar light fixtures, Please check our thread description to make sure the thread is a match to your fixture This HC Lighting Solutions - This is an alternative replacement for The Kichler 15575BK Polymeric 8-Inch Support Stake is for use with 12V fixtures. Our Spike is made using injection molded technology making them 1 solid piece. The Spike is a inexpensive way to obtain a corrosion resistant mounting spike for your landscape lighting spot light, path light, flood light, or landscape lighting fixture, while and provide maximum support and stability needed to keep your landscape illuminated. We guarantee satisfaction and our product meets or exceed the expectations for a Flat headed open Wire Way Spike. HC Lighting Solutions makes their own proprietary products which is not associated with any of the names referenced. The names referenced are a separate entity and all credit is given to them respectively. HC Lighting Solutions in no way takes credit for their products or rights. We make alternative solutions to bring more competitive prices to our clients alike utilizing our factories and resources.