the sanctuary lamp is a light or lit candle that shines red; it indicates the presence of Jesus in the tabernacle
It is lit to show that Jesus is in the Tabernacle under the aspect of bread.Jesus is the Light, they indicate that he is present.
sanctuary lamp
It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church. By Canon Law (Church Law), an oil lamp, know as a Sanctuary lamp, must always be burning before the Blessed Sacrament. This is usually a clear or red glass lamp on or above the altar where the Blessed Sacrament is reposed.
The Sanctuary lamp, when burning, lets us know that Our Lord Jesus Christ is present in the Tabernacle.
The Sanctuary Lamp is kept burning in front of the tabernacle in Catholic churches as a sign and a reminder that Jesus is really present in the Eucharist (Consecrated Host) stored in the tabernacle. In the Old Testament, God commanded that a lamp should always burn in the Tabernacle (Exodus 27:20-21). If there are no Consecrated Hosts in the tabernacle then the lamp is extinguished. This happens in every Catholic Church after Holy Thursday Mass until the Easter Vigil Mass on Holy Saturday night.
Sanctuary lamps actually date back to ancient Jewish times and the custom followed into the early Christian Church. God ordered that an oil lamp be kept burning constantly before the Jewish tabernacle in the temple.
It is called the Sanctuary Lamp. However, even though red is the most common color used, it is not required and some churches use lamps with other colored glass, or clear glass.
Catholic AnswerThe candle by the tabernacle, which is required to be burning anytime Our Blessed Lord is reserved in the tabernacle, is not necessarily red. Most parishes I know have a clear container for the candle, although some have a red one. There is no particular meaning, although red usually refers to the Sacred Heart (Our Blessed Lord, Jesus) and blue means Our Blessed Lady, the Immaculate Heart.
A sanctuary lamp is a lamp typically located near the tabernacle in a Catholic church. It is lit to signify the presence of the Blessed Sacrament reserved within the tabernacle. The lamp serves as a symbol of Christ's presence in the Eucharist.
The sanctuary is the part of the church which contains the altar.
Sanctuary
According to Roman Catholic tradition, the sanctuary lamp is not lit only two days out of the year: Good Friday and Easter Eve. These are the only times the Eucharist is not present in the tabernacle. The sanctuary lamp being lit represents Jesus being "home" in the church. On these two days, the host is housed elsewhere.Upon entering the assembly space:When the host is home (the light is lit), one should genuflect (bow on the right knee and make the sign of the cross on the forehead, chest, left-, then right-shoulder using the right hand) in the direction of the tabernacle and sanctuary lamp.When the host is elsewhere, one should genuflect to the altar (the table on the elevated platform called "the sanctuary"). This is to acknowledge the presence of the lord in the space and pay respect to the word.For more information, visit http://jloughnan.tripod.com/whylamps.htm"Why Do Catholics Have a Sanctuary Lamp Burning Night and Day in Their Churches?" by Paul Stenhouse MSC PhD