1.8kW (CDXL-18SD) 003-002742-01 2.0kW (CDXL-20SD) 003-001976-01 Christie CP2210 uses high efficiency, long lasting CDXL-SD series Xenon lamps as well as the CDXL-14M and CDXL-16M, new lamps designed for long life and low power consumption.The competition requires higher wattage lamps for the same light output, giving Christie clear advantage on cost of ownership and lumens per watt