500 Pcs Glow in the Dark Stones Garden Pebbles Rocks for Outdoor Walkways Path Product Features: -Made from PS(Polystyrene)+ Photoluminescent pigment, non-toxic and non-radioactive, do no harms to the environments. Include 500 pcs white glow pebble. Diameter: 0.8"-1.2"/ 2-3cm. -No Battery Required to Light Up: Require no electricity and no power, save oney for your decoration project. -Grow: After absorbing enough sun or light, the pebbles will glow for 2-3 hours. The pebbles can glow only for 2-3 hours, so please check the glowing effect within 2-3 hours after leaving the light source. -Application: Safe for any decoration or scene. Can be used to decorate the road, walkway, gardens, bonsai, aquarium and so on. Whether you are brightening up your fish tank or illuminating an outdoor walkway, these pebbles are sure to provide the glow you are looking for. Note: 1. After absorbing light, the pebble will glow brighter within 2-3 hours, and then the brightness will decay quickly. 2. The pebbles can glow only for 2-3 hours, please check the glowing effect within 2-3 hours after leaving the light source. Product Specification: Type: White glow pebble Pebble Color Options: White/Dark Purple/Green/Mixed Color Material: ABS glow in the dark plastic Package Included: 100/300/500 Pcs  Glow Pebble