Custom luminous Patches are sure to grab peoples' attention in dark places. ... After being irradiated by natural light, fluorescent light, ultraviolet light, etc., the light-emitting film can store light energy, and it can still be seen at night or in the dark. We generally apply it to TPU, embroidery and PVC materials, which can be customized on the sizes, patterns and shapes, It can be used for clothing, bags, shoes and hats. .