Light Activated Night Eagle LED Golf Balls have bright LED lights and internal batteries! Night Eagle LED Golf Balls use a new Light Activation Technology to activate and deactivate the glowing Golf Ball. Simply shine a bright Smart Phone Flash Light onto the activation circle on the Golf Ball to turn it on. Swipe the smart phone light over the activation circle in a slow motion over the circle to activate. Shine the same smart phone light onto the circle again to turn it off.