Glowing Stones: These pebbles absorb enough sunlight during the day and can glow for up to 3-6 hours at night or in other dark environments. If the brightness is not enough, please illuminate again Safe material: Made of high quality resin, durable, non-toxic, odorless, non-radioactive. Harmless to humans, fish, birds and plants. Due to fine workmanship and sanding, there are no sharp edges Exterior decoration: perfect interior and exterior decoration. These pebbles can easily add neat night features to any scene. Whether you are illuminating the fish tank or the outdoor sidewalk, these pebbles are sure to provide you with the glow you need. aquarium decorations, gardening, swimming pools, homes, parks, bird fountains, landscapes, flower pots, potted flower pots, patios, lawns, yards Easy to use: let the pebbles absorb at least 4 hours of sunlight or artificial light and follow the route. They glow brilliantly at night and turn your garden into a beautiful, dreamy landscape &34; > Good quality product..