Olympia Lighting has all sorts of HID LED replacement lamps and in particular they specialize in replacing the highest output HID lamps on the market! This includes up to 1000W and 1500W metal halides. One key factor to consider is there are some long-neck 1000W and 1500W metal halide lamps that are over 15" in length. There are few others that offer an LED alternative for this wattage and so far only Olympia Tech has a long-neck version of this BT56 lamp that has the same 15" length