•Ideal for decorating plant plots,garden walkway and paths, fish tank, succulents,yard, glass vases,landscaping, swimming pool as well as borders and flower beds. Recommend multiple packs with different color for large area. After being exposed under the sunlight or put stones under strong light (lamplight) for an hour,Glow stones can glow for hours in the dark. More hours of absorbing sunlight and stronger the light, the brighter the stonesEco- Friendly: 100PCS glow stones are made from polystyrene (PS), eco-friendly, non-toxic, non-radioactive, high polished with no sharp corners, safe for decorating garden and fish tank