Glow in the Dark Pebbles - 300 decorative glow pebbles, these pebbles absorb enough sunlight or other artificial lights during the day to glow for up to 3-6 hours at night or other dark environment. They can absorb light and shine continuously. Please radiate them again if they are not bright enough. Safe and durable: No electricity needed. Made of premium resin, which is durable, non-toxic, tasteless and non-radioactive. Neat and polished finishes, so there is no sharp edge. Make your yard cool - Edge a driveway, flower bed or fill a flower pot, make your garden or yard absolutely unique and cool Multifunctional light stone: ideal for aquarium gravel decorations, pond decorations, yard decorations, Halloween walkways, garden decorations, aquarium gravels , glowing rocks, etc. How to make them glow: No electricity required. Put them under sunlight or lamp to absorb light for one hour, they will glow for hours.