These battery powered lights are cast in glow in the dark, translucent urethane. They have been cast from real quartz minerals with a sculpted base.
Each crystal comes with a small LED tealight that can be set to flicker like a candle, flash or have a steady glow. It is turned on with a button at the top of the tealight itself and is then snugly placed into the crystal. You can also use a remote control for these lights if you want more convenience ( buy it here) . These light up with a birght teal color.
When these lights are charged with UV /sunlight they will glow a BRIGHT teal green. You could hang these lights from your ceiling with some hanging hardware, or have them on a book shelf or desktop.
