A color matching light box/standard light source box is a device that contains multiple different types of light sources and can output specific spectra and color temperatures. Color-matching light boxes are mainly used in textile, printing and dyeing, paint, paint, automobile, cosmetics, furniture, electronics, medicine, food and many other industries. By visually comparing the color of the color matching light box, the color differences of the goods can be detected very intuitively, so as to avoid the disputes between the manufacturer and the inspector caused by changes in the light source environment.

     The core components of the color matching light box/standard light box are various artificial standard light source tubes, such as the D65 light source recommended by CIE representing the average daylight,  A light source representing sunset, the CWF light source used in commercial and office organizations in the United States, TL84 light source for commercial color matching light source important in the European market, etc.

      The core technical indicators of the color matching light box/standard light box include the following: the standardization of light source spectral distribution,  the display uniformity of light source illumination, the stability of light source, the color temperature and color rendering index of light source, and the lifespan of light source.

     < JJF 055 standard light source box calibration specification > clearly requires the performance of standard light source, such as color temperature deviation not exceeding 5%, illuminance greater than 600lx, uniformity greater than 80%, etc. How to quickly detect the core indicators of the above-mentioned color matching light box/standard light source box?

     The CL800/CL500 illuminance meter can conveniently measure the stability, uniformity, and spectral matching of the light source in color matching light boxes/standard light source boxes. The operation process is shown in the figure.