Metal Ace conversion lamps are Metal Halide lamps that operate on High Pressure Sodium systems. A one-dimensional Lighting System is easliy and economically converted into a complete (Metal Halide/HPS) growing system that provides the full range of spectral energy required for all stages of plant growth and development. These lamps are 100% lead free. Extend the growing season to 365 days a year with EYE HORTILUX grow lamps. Choose EYE HORTILUX lamps to raise your lighting system to a new level of performance and optimize spectral energy levels to promote vigorous plant growth. Initial Lumens: 110,000 Glass size: BT-56