Candles and Their Symbolism.
Lit candles and Icon lamps (lampadas) have a special symbolic meaning in the Christian Church, and no Christian service can be held without them. In the Old Testament, when the first temple of God was built on earth — the Tabernacle — services were held in it with lamps as the Lord Himself had ordained (Ex. 40:5, 25). Following the example of the Old Testament Church, the lighting of candles and of lampadas was without fail included in the New Testament Church’s services.
The Acts of the Apostles mentions the lighting of lamps during the services in the time of the Apostles. Thus, in Troas, where Christ’s followers used to gather on the first day of the week (Sunday) to break bread, that is, to celebrate the Eucharist, there were many lights in the upper chamber (Acts 20:8). This reference to the large number of lamps signifies that they were not used simply for lighting, but for their spiritual significance.