Description Store light and shine in the dark Self-luminous pebbles can be used to give a little light in the garden path or just to brighten up the garden and home Create your own fairytale with these unique pebbles Suitable for most aquariums After being exposed to daylight, these pebbles glow in the dark Glow lasts about 2~3 hours after full sun exposure Material: Photoluminescent pigment + resin + Rare earths Color: Random Color ,the same color in the daylight Pls note: the Pebbles will require exposure to light before they glow Pebbles vary in size from 2-3cm each Weight: 362g