The new ceramic halide kits differ from traditional metal halide kits in using a ceramic crystal discharge tube, . This have boon previously tested on sodium lamps, which are well known for their stability and homogeneous color. The addition of different metallic elements, gives rise to the Mastercolour range or CDM (Ceramic Discharge Metal Halide). The ceramic material offers advantages such as greater stability of the lamp throughout its life, a homogeneous color between the different lamps, better color reproduction and higher performance.