... This latest 400W Metal Halide(MH) and High Pressure Sodium(HPS) Grow Light System benefits: vigorous growth, accelerate development, and ... High output, high luminescence efficiency. Fit for all standard 400 watts HPS grow light systems. Fit for the Heliophile, such as ... Electronic Ballast 1x Cool Tube Reflector 1x Ceramic Socket 1Set Hi-Low Yoyo Reflector Hanging kit 1x Free Timer 400 WATT 400WHPS ...