SET OF 3 LED LIGHT UP GOLF BALLS- set includes 1 white, 1 red, and 1 yellow light up golf ball. MOTION ACTIVATED- simply hit the golf balls on a hard surface or hit 2 of the balls together to activate; Glow stays on for approx. 8 minutes; Over 40 hours of light up time. INDOOR OR OUTDOOR- perfect for indoor or outdoor use. COSMIC MINI GOLF- add these golf balls to our Cosmic Mini Golf set for a bigger game with more players!