【High Quality】- Made of rarely produced high quality luminous powder with long heating time and polystyrene resin non-mineral products. Precise processing ensures smooth surface without sharp edges 【Long Lasting Light】- Requires no electricity and long life under low sunlight. These glowing garden stones absorb sunlight during the day and glow at night, glowing up to 2-8 hours in normal daylight 【Multiple Colors】- Bright Colors. Each pack of pebbles will bring you a feast of colorful light in the dark and add a wonderful atmosphere to your garden 【Reusable】- Remove the pack and put the pebbles in the sun for a few hours. Make sure every single light absorbs, glows in the dark and has a service life of more than 15 years 【Wide Application】- This gravel aquarium is perfect for fish tank, aquarium gravel, pond, yard, landscaping decorations, Potted plants, street or path lighting, garden gravel, handicrafts, etc. Product Description Specification: Material: luminous powder + polystyrene