This replacement 330 W UHP (Ultra High Performance) is a metal halide lamp manufactured by Philips, provided to you by Christie.
The benefits of using a UHP lamp in this Christie projector is that is allows for a smaller and lighter projector (because the power supply is smaller and lighter), a cooler running, quieter, and less expensive-to-operate projector (because of the lower wattage) and a longer lamp life (because the stresses on the lamp are reduced).