Infinite Glow: Stickers of this Glow in the Dark series absorbs energy from light sources such as daylight, LED, or fluorescent lamps, stores this energy, and emits a bright glow in the dark. This glowing process is infinite and completely safe, as the tape contains no radioactive materials. Performance and Durability: With a total thickness of only 0.211mm (excluding the release paper), the decal is both incredibly thin and durable. It will not interfere with your fingers while playing. It is designed for smooth application and removal. Important Safety Note: To prevent hydrolysis of the phosphorescent pigments, avoid using this product outdoors, in environments where water or condensation may occur, or in areas exposed to direct sunlight.