Beijing Yuji LEDs (YUJILEDS®) started to make LED phosphor and emitters since 2005. YUJILEDS® is located in China, Japan and the United States. It is a national high-tech enterprise jointly established by many well-known experts and scholars at home and abroad. YUJILEDS® is also a joint venture partner of Mitsubishi Chemical Japan. YUJILEDS® is an international industrial leader in high CRI LED phosphors and light sources and owns 43 domestic and international LED patents. Its essential business covers LED phosphors and special LED light sources in fields of color science, industrial inspection, photography and horticulture. In 2019, YUJILEDS® has developed an energy-saving D50 LED color viewing lamp that meets the ISO3664:2009 viewing standard and D65 LED color viewing lamp in compliance with the ISO3668:2017 viewing standard based on its unique full spectrum daylight simulation technology. YUJILEDS® has now become a color viewing lamp supplier for leading European and American printing groups.