100 Pcs Luminous Stones Home Garden Aquarium Landscaping Glow in the Dark Pebbles Artificial Fluorescent Plastic Gravel Luminous Stones Dark Garden Pebbles Glow Stones Rocks for Luminous Light-emitting Artificial Pebble Lawn Garden Yard Decoration Note: The correct light-emitting principle: whether it is day or night, if you want it to glow, you need to illuminate it with a light source for about 10-20 minutes, and then take it to a dark place for observation. How do you make them glow? 1.Don't leave the pebbles under light with the package . 2.Don't pile up pebbles , make sure each pebble is fully illuminated . 3.When the pebbles are glowing , please make sure the surroundings are dark enough . 4.You can enjoy the glowing pebbles,the longer the absorption time , the longer the illumination time . Package list: 100 PCSLuminous stones Materials:Acrylic Size: 1.3*0.9cm Features: 100% brand new and high quality. High brightness, long life time expectancy. Water, acid and alkali resistant, antioxidant. It could be used over and over again.