Pebble conch sea shells style, perfect for decoration,suitable for fish tank, pebble road, wall, vase, flower pot, swimming pool etc.
First time to use, you need to make the stones exposed in the sun for about half an hours. When the stones absorb enough light, put them into water, and they can glow lighter in the dark.
The stones can absorb the nature daylight and lamp light every day by themselves. Besides, the stones can keep glowing for about 5 hours at a time.