Mass Intentions and Sanctuary Light

Christian churches often have at least one lamp continually burning before the tabernacle, not only as an ornament of the altar, but for the purpose of worship. The General Instruction of the Roman Missal in the Catholic Church, for instance, states (in 316): "In accordance with traditional custom, near the tabernacle a special lamp, fueled by oil or wax, should be kept alight to indicate and honor the presence of Christ." The sanctuary lamp is placed before thetabernacle or aumbry in Roman Catholic, Old Catholic, and Anglican churches as a sign that the Blessed Sacrament is reserved or stored. With influence from Judaism in the Old Testament, God told Moses that a lamp filled with the pure oil should perpetually burn in the Tabernacle (Ex 27:20-21). This is the precedent for the Catholic Church’s custom of burning a candle (at all times) before the tabernacle – the gold house where the Eucharistic Body of Christ is reserved under lock and key. http://en.wikipedia.org/wiki/Sanctuary_lamp