Second, you should understand who turned on the light. If it is a monk, it is usually an old thing; If the store opened it, did you cover it with a red cloth when you invited it? Did I show it to you? Generally speaking, the red cloth can't be opened until you come back. I usually show you pictures.
Third, generally speaking, it is difficult to see a spiritual brave in the market, mainly for peace of mind.
Fourth, you can generally feel the physical essence of spiritual magic, in other words, it looks special at first glance.
Finally, I want to say, if you are afraid of not getting a real invitation, you can go to the temple. Animals are the spirits of Guanyin Bodhisattva. You can visit Putuo, but it is hard to get the truth.