Features: 1.Glowing small stones: They can't glow by themself, must absorb enough sunlight during the day to glow up to 3-4 hours at night or any other dark environment. The light is brighter in the first hour. As the light energy is gradually released, the luminous effect will gradually weaken until it becomes dark. After that, the light absorption operation needs to be repeated. 2.Application: It is suitable for DIY road landscaping of garden villas, fish tank and aquarium decoration, flower trays, balconies,swimming pool, wedding decoration, luminous character production, counter decoration, etc. 3.Luminous stone luminescence principle: The luminous principle of our luminous stone is the process of absorbing light energy, storing light energy and releasing light energy, which can be reused repeatedly.The more dark the environment, the better the effect! Specification: Type: Glow in The Dark Pebbles Quantity: 300pcs Size: 0.67"X0.5" Color: Blue Material: Plastics and Resins Package Including: 300 PCS Glow in The Dark Pebbles