GTI is a leading manufacturer of D50 and D65 LED lighting systems for standardized color viewing. Our Graphiclite D50 daylight products are used by packaging, printing, and photographic professionals. Products include desktop systems, pressroom viewing stations, floor-stand models, and large format systems. LED and fluorescent lamps are offered. Graphiclite products conform to the ISO 3664:2009 viewing standard. D65 products are used for industrial color applications and conform to the ASTM D1729, ISO 3668, SAE J361 viewing standards.