Color Proof Light Box 1. Five light sources 2. China patent product 3. ... "Cool White Fluorescent" American Standard220W4200KU30Warm White Fluorescent218W3000K Characters 1. Shows the using time of each light source, name and switching times2 ... discretionally, more convenient. Function Widely used to calibrate the goods’ color in the production of textiles, toys, printing dye, plastic,ink ...