This magic ghost pebbles will make your home different. After sunshine during the day, the night walkway to launch up to three hours of blue or green light. Make your garden more beautiful. Features: Easy to use, just put the pebbles on the edge of the walkway or flower beds, or use it for decorative vases, aquarium landscaping, gardening, swimming pool, bar, villa gardening potting, parks and so on. After sunshine during the day, the night walkway to launch up to three hours of blue or green light. Make your garden more beautiful. It can be used repeatedly, their life expectancy lasts up to 15 years. Non-toxic and tasteless, non-radioactive, environmentally friendly resin, non-mineral. Package include: 10/20/50x Luminous Stones NOTE:These stones can't glow by themself. But these pebbles absorb enough sunlight during the day to glow up to 2-3 hours at night or any other dark environment. Please radiate them with light again if they are not bright enough. 1. Q: Will the luminous stone not shine, is it invalid? A: The luminous stone is a light-storing product. The principle is that it can emit light by absorbing the light source. Each time the light is emitted is 8-12 hours, during which the first 1-2 hours is the high light period and continues to glow. The received product did not emit light because there was no absorption light source during the logistics. As long as you get sunlight or light for a while, you can shine again. 2. Q: Why do I have a day's sun during the day and it is still not lit at night? A: Because the principle of luminous is to absorb light and emit light, which means that it begins to glow in the process of storing light. If the light is absorbed during the day, but after a dusk time, the luminous period of the luminous light is over, so you can only see it slightly. Weak light, but when you turn on the lights, you can see very bright. 3. Q: What is the brightest color of luminous stone? A: The luminous stones are luminous in white color, such as bright yellow green, blue green, and green. Other colors are colored with yellow-green powder plus color powder. The toner will cover the glow of luminous powder. After being exposed to strong daylight with 3 hours, these pebbles can be lighted within 1-2 hours in the dark. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you