What does it mean to light a lamp on a fortune-telling stone? Is the fortune-telling light fake?

What does the fortune teller mean when he says the light is on?

Light candles and butter lamps to worship Buddha and Bodhisattva, and protect the law and be kind to God. Can make wisdom grow and eyes bright. You can do it in the temple. Not at home. Specifically, the key is to "send a happy heart" to worship the lamp. If you don't like it or are unhappy, don't. Don't force it. Offering lanterns is generally for the sake of children, seeking brains and learning. In front of Manjusri Bodhisattva, there are plenty of butter lamps. Manjusri Bodhisattva represents wisdom,