The use of light in the context of worship goes back to the Tabernacle and the Temple where a lamp was perpetually lit before the Lord. The Psalmist declared that the Lord is our light and our salvation (Ps 27). Jesus declared
Himself to be the Light of the world (St. John 8) and Christians are admonished to walk in the light (I John 1). Thus light holds great significance to the Church. Since at least the Middle Ages candles were lit as an offering (votive) to the Lord accompanied by prayer, usually an intercession. It represents bringing our prayers into the light of Christ.

Writers in the Middle Ages assigned more significance to the candle. The pure beeswax represents the sinless Of Christ. The burning wick represents His humanity and the light represents His divinity.