2.material；plastic/resin
3.Luminescence principle:After absorbing light under sunlight or light for 5-20 minutes, luminescent materials convert the absorbed light energy and store it in the lattice. In the dark, the stored energy can be converted into light energy and emit light. Stable chemical properties, repeatable light storage and emission processes, stable performance, and a service life of over 20 years
4.package:100pcs random color