No need to rush your game. These ingenious golf balls let you continue playing well after dark. Each ball has a bright-red LED bulb that flashes—which means no more wasted time searching the fairway. The light activates when t he ball is struck or dropped, so you can find your ball even when it’s hit into the woods. The balls meet all USGA size, weight, accuracy and distance regulations. Internal lithium batteries last over two years or 80 hours.