A strong swing of your club is all you need to activate your LED Golf Ball. You can also activate by touching a strong light source, such as the light from your smartphone camera to the printed circle on the ball. Once illuminated, light will continue to be emitted for 8 minutes, the internal timer will be reset if a strong impact is felt while the ball is glowing. If the balls glowing turns off patented afterglow chemiluminescence technology helps to charge your ball so it can be found. LED Color: Green LED Golf Balls were designed with the professional golfer in mind. You can expect the play ability, performance, and control of a real ball with an added glowing bonus! 1 Ball per Order.