MH 1000w Conversion Lamp BT-56, Iwasaki Lamps. Gardeners can add versatility to their existing 1000-watt high pressure sodium HID system with the 1000-Watt Hortilux Metal Ace Metal Halide Conversion Lamp. This lamp distributes the blue spectral energy plants require for healthy vegetative development. Emitting 118,000 initial lumens and rated at 12,000 life-hours, this BT-56 type lamp is classified as universal to fit horizontal and base up systems.The environmentally-conscious design is completely lead-free.