The unique and patented noctilucent technology stores light and emits it again in the dark for many hours. Normally, the integrated light crystals are fully charged after only 10-15 minutes and release the light in the dark for up to eight hours. This makes “noctilucent products” a valuable orientation aid and provides security. The material is environmentally friendly, 100 percent recyclable, requires no electricity and has a service life that lasts for decades.