According to the inquiry and experience website, those things in the temple, such as amulets and bracelets, are anyone's guess. Many items, such as hand cards and hanging tags, must belong to the items opened by monks, because no one knows that the shops selling so-called opening items in temples are not necessarily temples, but may be contracted out. If you really want to get the things that have been opened by monks, you'd better ask the master sincerely.

"Opening the light" means putting the "spiritual power" of religious gods into something through rituals, and then this thing has sacred power. The earliest use of "opening the light" was to open the light for the gods of Taoist temples.