GLOW IN THE DARK PEBBLES: These glowing pebbles absorb and store energy from sunlight and other light sources, glow in the dark night. Let the gravel absorb enough sunlight or artificial light for at least 4 hours and pave them along the trail. They will emit a brilliant glow at night and transform your garden into a beautiful and dreamy landscape! Please shine them again if they are not bright enough. ENVIRONMENTAL & SUSTAINABLE: The light pebbles are made from polystyrene (PS), which is non-toxic & tasteless, non-radioactive. It is safe for people, fish, birds and plants. Glow stones are perfect for aquarium decorations for fish tank, mason jar, walkway, garden decor, fish tank decoration. PERFECT FOR DECORATIONS: Line a walkway, border a flower bed or fill a planter with those pebbles that will glow in the dark after being exposed to daylight.Ideal for waterscapes, landscape decoration, potted plants, the edge of a flower bed, lighting a pathway or driveway, gardens, crafts,