Eye Hortilux 901600 Ultra Ace High Pressure Sodium Conversion Lamp, 360-watt Ultra Ace conversion lamps are HPS lamps that operate on Metal Halide systems. Transforms a one-dimensional Metal Halide Lighting system into a complete growing system. Provides optimum red spectral energy required for flowering. EN designation means environmentally friendly in that the lamps pass EPA, TC Liquid Propane test criteria as non-hazardous waste.