1. Do I need to leave them in the sun to make them glow? In order to achieve better effect, make sure you put these pebbles in a nice sunny place for a couple of hours. The more light you shine on them, the brighter they will be at night. 2. Can I place them in the shade? →USE - Line a walkway, edge a flower bed or fill a planter with these glow stones stones that will glow in the dark after being exposed to daylight.Ideal for waterscapes, landscape decoration, potted plants,edge a flower bed, lighting a pathway or driveway, gardens, crafts, aquariums, etc. 3. How much light they require, and how long they glow based on sun exposure? The Glow Pebbles Stones made from eco-friendly resins and photoluminescent pigments, they can continuous glow for 5 hours and more after get full sun exposure. 4. What makes them glow? Our Glow in the dark Pebbles Stones use High quality luminescent materials (The luminous Effect is mainly related to the luminescent material) 5. Are they safe? What are they made out of? They are safe ,Non-toxic and non-radioactive. The Glow Pebbles Stones made from eco-friendly resins and photoluminescent pigments. 6. How long do they remain active (I mean how many years if I continue to expose them to light) They can be used repeatedly. Their life expectancy lasts up to 10 years. Warning! - Not toy, keep away from children for chocking hazard. Thanks.
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