Super-LumiNova® is a high-performance phosphorescent pigment, also called "photo-luminescent" or "afterglow" pigments, these are the most common used, non-radioactive and non-toxic alternative for illuminating markings on timepiece dials and hands in the dark. Unlike tritium, SuperLuminova needs to be charged by light to give an afterglow, thus illuminating the face of a watch in the dark. Learn more about Super-LumiNova®, here.