Make your garden or yard to look different from your neighbors at night with glowing stones! Product features: - Line a walkway, edge a flower bed, decor garden or fish tank with these unique pebbles. - After absorbing light, the pebble will glow brighter within 2-3 hours, and then the brightness will decay quickly. - Pebbles can absorb light repeatedly, and their life expectancy lasts up to 15 years.Specifications: Material: Photoluminescent pigment +Polystyrene Color: Pink in Daytime, glowing Purple in the Dark Size: 0.8"-1.2"(approx) Package includes: - 150 × Pebbles Stone(Pink in Daytime, Purple in the Dark )HOW TO USE: To glow in the dark, glow stones need charge power with light first. Best power source is lamp light. Charge with lamp light, rocks could glow bright about 10 hours. If charge with sun light, rocks glow around 2-3 hours. If you put rocks in your garden, we advice to put rocks near lamp. Or just use a torch on rocks for few minutes, then rocks will glow brightly whole night. Since if the power source only from sun, light to dusk to dark is such a time lapse that you may not going to see the full glow potential. even may can?t see the rocks glowing. Sure, if put rocks as indoor or aquarium decoration, nothing need worried. It will glow bright the whole night.Notice: make sure stones absorbed enough light before glow. WARNING: Keep away from children for chocking hazard.