If Glow Technology’s top-quality glow powder is used, it can glow more than 12 hours. The glow in the dark stars is fully charged and placed in a dark environment, which will release 99% of energy within an hour, and the remaining 1% can last for more than 10 hours.
According to the definition of the World Luminous Association PSPA, as long as the brightness of the glow in the dark powder exceeds 0.32mcd/m2, it can be defined as that it is glowing. This brightness is the lowest brightness that the human eye can recognize in a completely dark environment.