Light box is also called Color Controller Light Box or Color Assessment Cabinet. It is the illuminant for testing the products color difference. Four light sources light box contains the following 4 kinds of illuminantion: D65,TL84,UV and F. After connect with electricity, press the suitable illuminant button, it will be turned on. And then we could compare the samples color difference inside the box. Multi light sources could be turned on at the same time. Customer could choose the suitable light source according to his or her need. The most commonly used light source is D65.