Standard Light Source

• Meets standards requirements of International Commission on illumination (CIE) and CY3-91;
• Reduced effect of Metamerism;
• Standard and even illumination without flashing;
• Ready to used on start-up as no warm-up or heating requirement;
• Low energy consumption.

Working Principle

Standard light source is a theoretical source of visible light with a profile (its spectral power distribution) which is published and conforms to international standards. Coloring comparison usually occurs under sunlight in daily life, whereas industrial color comparison requires the light source with equivalent spectra distribution of sunlight, which is defined as D65 standard light source by International Commission of Illumination (CIE). However, metamerism effect always occurs when matching color. It makes the same specimen show different colors in different light source, which will lead to confusion. Application of light source will effectively avoid such unfavorable effect.