The glow in the dark golf balls are very bright, you will have a lot of fun when play them at night. Our LED golf balls are easy to find when playing golf at night, also suitable for Indoor and outdoors.Constantly On - The golf ball will stay lit for 8 minutes after every activation. The battery lasts 40 hrs, that means you can expect to light up the ball 300 times.This is the best gift for your parents, friends. And get a lot of fun from it.