HPS 940w U Conversion Bulb E-2, Iwasaki Lamps. Do you want sodium light from your metal halide HID system? Use with this Hortilux 940-Watt Conversion Lamp. This lamp essentially converts a 1000-watt halide system to a 940-watt sodium. Lamp can be operated horizontally or vertically and emits 130,000 lumens.