High-performance 250 Watt Retrofit Kit Metal Halide Equivalents allow you to convert your existing fixtures from metal halide and high-pressure sodium to LED. This allows you to keep your existing fixtures but take advantage of the brighter, more reliable, and cost-reducing benefits of LED. These retrofit kits last a very long time and come with the same warranty period for LED fixtures. Just follow the instructions and these retrofit kits for metal halide should easily operate trouble-free for 10 + years.