Vertex 400W Metal Halide Retro Kit with Electronic Ballast. Kit includes: - Vertex 400W Electronic Ballast - Spider Reflector with Mogul Socket - Power Cord - 400W Metal Halide Mogul Base Lamp (Please see lamp selection for available lamp upgrades) The Vertex Electronic Metal Halide Ballast; boasting our "flawless design, remarkable performance" philosophy, this is the Metal Halide ballast to benchmark all others. Powered by a technologically advanced electronic core, each Vertex Electronic Metal Halide Ballast produces unparalleled peak performance with the highest power factor on the market. Reflector Options: * Spider ReflectorFeatures Advance reflector design. Designed for 1 Metal Halide with Mogul Base (included). Mirror finish for up to 99% reflectivity. Approx. Dimensions:5" x 11" x 13" ( HxWxL ) * Large Spider ReflectorFeatures Advance reflector design. Designed for 1 Metal Halide with Mogul Base (included). Mirror finish for up to 99% reflectivity. Approx. Dimensions:6" x 13" x 16" ( HxWxL ) * Lumenarc III Reflector - Square, symmetrical design for amazing output & uniformity - Accommodates all lamp sizes except BT-56 (1,000W) - Does not accept glass UV lense - Includes complete socket assembly - Dimensions: 19.25” L x 19.25” W x 9” H * Lumenarc III Mini Reflector Same as our Lumenrarc III but smaller to fit tighter canopies. - Dimensions: 14.5” L x 14.5” W x 6.5” H * LumenBright 3 Reflector Revolutionary brand new design from CoralVue. LumenBrite III reflectors are made from mirror finish German Aluminum with 95% reflection rate. Octagonal Design with total of 25 Optical plains for maximum reflection rate. Up to 16% more efficient than any other similar designed reflector on the market. Dimensions: 19 3/4" x 19 3/4" x 9" H LumenBrite 3 Mini Reflector: Same as LumenBrite 3 but smaller to fit tighter canopies. Dimensions: 16" x 16" x 7" H * LumenMax ELITE Mogul Base SINGLE ENDED Reflector by Sunlight Supply: High performance 95% reflective Alanod brand reflector material. Highest output in it’s class. Quick release low profile mounting bracket for canopies. Designed to illuminate 2’x2’-30”x30” areas. Adjustable socket with multi-position power cord, Powder coated and rustproof frame. Can be suspended with our wire-suspension hanging kit (sold separately) Lightweight (3.7lb with socket) Dimensions: 14.5”x14.5”x5.3"