The color matching cabinets 425 MC and 425 MC II meet the requirements for a measuring equipment monitoring system, since the operating hours of the lamps can be displayed. All systems that we offer meet the requirements of the ASTM D 1729 standard (including CIE publication 51) for light quality and intensity, lighting and viewing symmetry, environmental conditions and uniformity. The MATCHMASTER 425 MC II comes standard with a calibration certificate (for light quality). A specially certified set of bulbs can also be delivered with this system. For the MATCHMASTER 425 III and 425 IV, a test certificate (for light quality) will be issued upon delivery.