Why is the color level of the sub-level? The key lies in the spectral characteristics of the light, the wavelength of visible light in the range of 380nm to 780nm, which is what we see in the spectrum of red, orange, yellow, green, blue, blue , The range of violet light, if the light emitted by the light contained in the proportion of light and natural light close to the color we see the eyes will be more realistic.
We generally color rendering index for characterization. The standard color in the standard light irradiation, the color rendering index set at 100. When the color is the test light source irradiation, the degree of color distortion in the visual, is the light color rendering index. The larger the color rendering index, the less distortion, on the contrary, the greater the distortion, the smaller the color rendering index. Different places on the light color rendering index requirements are not the same. In international lighting associations generally the color index is divided into five categories:
Category Ra scope of application
1A> 90 Art galleries, museums and printing industries and places
2B 80-90 Home, Restaurants, Advanced Textile Technology and Similar Industries
2 60-80 Office, School, Outdoor Street Lighting
3 40-60 Heavy Industry Factory, Outdoor Street Lighting
4 20-40 outdoor road lighting and some less demanding places