Dogs need to be taught by their owners how to play with balls. They need to be encouraged and rewarded every time they fetch the ball. When you throw a ball, and your dog grabs it, then you need to reward it with a motivator.
You can either give them a treat or lots of hugs. It will be easier for you to teach your dog how to grab a glowing ball. When it shines at night, your dog will grab it enthusiastically.