Metal halide lamps, traditionally made with quartz arc tubes, are prone to colour shift through life and lamp-to-lamp colour variation. Some of the dose, e.g. sodium, (an important component of metal halide lamps), can migrate through quartz to cause colour shift and loss of light through life. The ceramic arc tube resists this material loss, can be manufactured to tighter tolerances and withstands a higher temperature to provide a more constant colour. Features Consistent colour over life Good colour uniformity lamp to lamp Bright light in a very compact size Excellent colour rendition Improved reliability due to 3 part design Up to 18,000 hours life UV control Colour temperatures 3000K, 4200K |