Philo Judaeus, the seven lamps of the golden menorah represented the seven classical planets in this order: the Moon, Mercury, Venus, the Sun, Mars, Jupiter, and Saturn.
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The menorah symbolized the ideal of universal enlightenment.The seven lamps allude to the branches of humanknowledge, represented by the six lamps inclined inwards towards, and symbolically guided by, the light of God represented by the central lamp. The menorah also symbolizes the creation in seven days, with the center light representing the Sabbath. It is also said to symbolize the burning bush as seen by Moses on Mount Horeb
Six tributary branches coming out of the main shaft was decorated with three sets of "cups... shaped like almond blossoms... a bulb and a flower..." (Exodus 25:33, NASB). This would create three sets of three units on each branch, a total of nine units per branch. The main shaft, however, had four sets of blossoms, bulbs and flowers, making a total of twelve units on the shaft (Exodus 25:34). This would create a total of 66 units, which Conner claims is a picture of the completed Christian canon of scripture (containing 66 books). Moreover, Conner notes that the total decorative units on the shaft and three branches equate to 39 (the number of Old Testament books); and the units on the remaining three branches come to 27 (the number of New Testament books).[21]Conner connects this to Bible passages that speak of God's word as a light or lamp (e.g. Psalms 119:105; Psalms 119:130; cf. Proverbs 6:23).
Synagogues have a continually lit lamp or light in front of the Ark, where the Torah scroll is kept, called the ner tamid (eternal light). This lamp represents the continually lit ner Elohim of the menorah used in Temple times.
In addition, many synagogues display either a Menorah or an artistic representation of a menorah.
A menorah appears in the coat of arms of the State of Israel, based on the depiction of the menorah on the Arch of Titus.
Sometimes when teaching learners of the Hebrew language, a chart shaped like the seven-lamp menorah is used to help students remember the role of the binyanim of the Hebrew verb.
Temple Institute has created a life-sized menorah, designed by goldsmith Chaim Odem, intended for use in a future Third Temple, The Jerusalem Post describes the menorah as made "according to excruciatingly exacting Biblical specifications and prepared to be pressed into service immediately should the need arise.".The menorah is made of one talent (interpreted as 45 kg) of 24 karat pure gold, hammered out of a single block of solid gold, with decorations based on the depiction of the original in the Arch of Titu.
In Taoism, the Seven-Star Lamp qi xing deng δΈζη is a seven-lamp oil lamp lit to represent the 7 stars of the Northern Dipper.[25] This lampstand is a requirement for all Taoist temples, never to be extinguished. In the first 9 days of the lunar 9th month festival, an oil lamp of 9 connected lamps may also be lit to honour both the Northern Dipper and 2 other assistant stars (collectively known as the Nine Emperor Stars), sons of Dou Mu appointed by the Taoist Trinity (the Three Pure Ones) to hold the Books of Life and Death of humanity. The lamps represent the illumination of the 7 stars, and lighting them are believed to absolve sins while prolonging one's lifespan.
I just posted a blog about The Three Pure Ones, yesterday.