Here the word "hand" is a metonym that refers to a person's authority, control and power. AT: "out of Solomon's control" (See: [[rc://en/ta/man/translate/figs-metonymy]])
The word "lamp" is a metonym that refers to a person's influence and guidance. AT: "will always have a descendant to rule as an influence and a guide for obeying my covenant with David's family" (See: [[rc://en/ta/man/translate/figs-metonymy]])