A sanctuary lamp, altar lamp, everlasting light, or eternal flame is a light that shines before the altar of sanctuaries in many denominations of Jewish and Christian places of worship. Prescribed in Exodus 27:20-21 of the Hebrew Bible, this icon has taken on different meanings in each of the religions that have adopted it. The passage, which refers to prescriptions for the tabernacle, states:
|“||And thou shalt command the children of Israel, that they bring thee pure oil olive beaten for the light, to cause the lamp to burn always. In the tabernacle of the congregation without the veil, which is before the testimony, Aaron and his sons shall order it from evening to morning before the LORD: it shall be a statute for ever unto their generations on the behalf of the children of Israel. (KJV)||”|
In Jewish tradition 
In Judaism, the sanctuary lamp is known by its Hebrew name, ner tamid (Hebrew: נֵר תָּמִיד), which is usually translated as "eternal flame" or "eternal light". Hanging or standing in front of the ark in every Jewish synagogue, it is meant to represent the menorah of the Temple in Jerusalem as well as the continuously burning fire on the altar of burnt offerings in front of the Temple. It also symbolizes God's eternal presence and is therefore never extinguished. It is also intended to draw parallels between God and fire, or light, which is emphasized throughout the book of Exodus in the Torah. Additionally, it is often used to symbolize the light released from the shards of the receptacles that God used to create light and goodness.
These lights are never allowed to dim or go out, and in the case of electric problems, alternative emergency energy sources are used to prevent it from diminishing.
Though once fueled by oil, most today are electric lights, including some that are solar-powered.
Hanukkah story 
The eternal light is central to one of many stories behind the celebration of the Jewish festival of Hanukkah. When the ancient Maccabees rebelled and reclaimed the Temple in Jerusalem, they rekindled the eternal light. However, there was only enough oil to keep the flame burning for one day, and it took eight days to bring new oil. Miraculously, according to the story as recounted in the Talmud, the flame continued to burn until the new oil arrived.
Today, Jewish celebrations of Hanukkah include the lighting of the Hanukkah menorah, or "Hanukkiyah", which has nine branches: including one for the candle used to light the eight flames (candles or wicks in oil), recalling the story.
In Christian tradition 
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 honour the presence of Christ." The sanctuary lamp is placed before the tabernacle or aumbry in Roman Catholic, Old Catholic, and Anglican churches as a sign that the Blessed Sacrament is reserved or stored. It is also used in Lutheran churches to represent the presence of God. The sanctuary lamp may also be seen in Eastern Orthodox Churches. Other Christian denominations burn the lamp to show that the light of Christ always burns in a sin-darkened world.
Such sanctuary or tabernacle lamps are often coloured red, though this is not prescribed by law. This serves to distinguish this light from other votive lights within the church. In the Catholic Church, red is widely used despite the preference for white expressed by Fortescue. The use of multiple lights, always in odd numbers, i.e., three, five, seven, or more, in place of a single lamp has now become rarer, though it is still seen in some older Catholic churches and in eastern Christian churches. The lamp may be suspended by a rope or chain over the tabernacle or near the entry of the sanctuary, or it may be affixed to a wall; it is also sometimes placed on a ledge beside the tabernacle or on an individual stand placed on the floor, as seen in the image of St. Martin's church, Kortrijk, Belgium, in the article Church tabernacle. Oil lamps or candles may be used.
Secular references to the Sanctuary lamp 
In the United States, the Boy Scout Jewish religious emblem, a medal earned by scouts for meeting certain requirements of religious activity and education, is called the Ner Tamid.
See also 
- Ask the Pastor: Sanctuary Lamps
- Leviticus 6:5
- Amator Liturgae (March 1920). "Studies and conferences:What is a rubrical altar?". The Ecclesiastical Review. 7 62 (3): 289. Retrieved 2011-12-27. "There is,as he also notes, no authority whatever for the glass of the sanctuary lamp being other than white"
- The requirements for earning this emblem may be found here.
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