The menorah was an important component of the Tabernacle. It had two purposes: to furnish light and to remind all Israel that God is light. Indeed, from the second Temple through the Greco-Roman period, the menorah became the most frequently used symbol in Judaism. Today it is the national emblem of the State of Israel. Read more about the Lamp of the Lord Here
This is Randall Price’s article from Israel My Glory magazine from FOI.org