Shiny Stone Glow in The Dark Gravel,Garden Gravel, Glow Stones,Decorative Garden Stones,Glow Rocks for Fish Tank Aquarium Backyard Walkway Garden Gifts Decoration (Briolette 2.5-3cm, Yellow Green)

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When you receive the parcel please kindly put all the pebbles in the sun for about half an hour to make them charge fully for the first time use, then you can watch in the dark, they will glow brightly. They will last the glowing for about 2 -3 hours in the fully dark space. They can charge and glow repeatedly. If you want them to glow all the time in the dark indoor or outdoor please install a UV light above them.
If you want it to glow all the time in the dark indoor or outdoor please install a LED UV black light above them.