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Universal Lighting M400ML5AC4M-500K Metal Halide Ballast All Brands_Fusetron it provides reliable protection forUniversal Lighting M400ML5AC4M 500K Metal Halide Ballast The Universal Lighting M400ML5AC4M 500K Metal Halide Ballast is designed to provide optimum light output from metal halide lamps. This ballast features metal halide technology allowing for superior durability and long lasting performance. This energy efficient ballast delivers up to 500k lumens at an output of 400 watts, making it ideal for a wide variety of lighting applications. 400 Watts Uses