1. The artificial sunlight D65 recognized by the Commission International Eclairage (CIE) is regarded as the standard base lighting source.
2. Illumination range of light source is 750 to 3200 Luxes.
3. The background color of the light source is medium grey, and its reflex rate must be lower than 1/3 of the incident light.
4. It has the function to test concolorous and different-spectrum effects. The microcomputer is adopted to control the mode of the instant fast switching-over among various light sources, so as to avoid the flickering light-up like household light pipe and to accurately compare color difference of goods under different light sources.
5. It can accurately record the service time of each group of luminous tubes. In general, the luminous tube should be replaced after the service of more than 2000 hours for fear that the testing failure occurs due to the ageing of the luminous tube.
6. Ultra-Violet Illuminant (UV) shall be equipped and used to test the articles with fluorescence and whitening dyes.
7. Store illuminant shall be equipped to provide the contrast color with other light sources.
