This set is made from a semi translucent polymer and contains a high powered LED with a long life battery. When activated the LED causes the entire ball to glow allowing you to play all night long! From the Manufacturer With Water Sports lighted Bocce Ball set, you can play into the wee hours of those warm summer nights. Made from a semi-translucent polymer and containing a high powered LED with long life battery, this set will allow your game to last hours. With a simple on/off switch, you won’t have to worry about your bocce set running through its battery life when it’s not being used. This set comes with 6 illuminated balls, 1 illuminated marker ball, and a carrying case for easy transportation and clean up. This Bocce set is sure to provide your family and friends hours and hours of entertainment.