FeatureMaterial - Photoluminescent pigment resin.Easily Charge - No electricity required. Put them under sunlight or lamplight to charge for an hour them they will glow for hours. Make your yard cool - Line a walkway, edge a flower bed or fill a planter with these pebble, make your garden or yard absolutely unique and cool! Multi-purpose - Great for home decoration(Walkway/Plants Pot/Fish Tank/Swimming Pool), art & crafting, DIY gift, night light, etc. Long life - The pebbles are rechargable and work for yearsPackage Included: 50PCS Glow in the Dark Pebbles