... :5-24 hours .Storage life:up to 2 years .Non-toxic, non-flammable, non-radioactiv Certificate CE, EN71, ASTM, MSDS, BP, 7P, ... 31*23PrincipleNo heat, flame and sparks, no battery requiredAdvantageNon-toxic, non-flammable, non-radioactive, waterproof, windproof Usageconcert, dance hall, Halloween, party, ... factory, and build happy long cooperation. custom print glow stick_made in China plastic stick