Tangle Sport Matrix Nightball Football (Large) The Tangle NightBall Football is loads of fun when played during night time - each football contains special LED lights that illuminate when the ball is thrown Measuring 8" x 4.5" x 4.5" The faster the ball spirals through the air, the brighter the LED lights glow. One battery is included LED Lights can last up to 40-50 continuous hours of play