Seven lamps - These lamps were probably like those used by the Egyptian and other nations, shallow covered vessels more or less of an oval form, with a mouth at one end from which the wick protruded. The candlestick was placed on the south side of the holy place Exodus 26:35, with the line of lamps parallel with the wall, or, according to Josephus, somewhat obliquely. If the wick-mouths of the lamps were turned outwards, they would give light over against the candlestick; that is, toward the north side (see Numbers 8:2).
Light was of necessity required in the tabernacle, and wherever light is used in ceremonial observance, it may of course be taken in a general way as a figure of the Light of Truth; but in the sanctuary of the covenanted people, it must plainly have been understood as expressly significant that the number of the lamps (seven) agreed with the number of the covenant. The covenant of Yahweh was essentially a covenant of light.
They shall light - See the margin and the note at Leviticus 1:9.

And thou shall make the seven lamps thereof,.... Which were, six of them, on the top of the six branches that came out of the sides of the candlestick, and the seventh on the top of the shaft which ran up in the middle of it; which no doubt were made of gold as well as the rest, and may signify the many members of churches bearing the lamp of a profession: or the several gifts and graces of the Spirit, which are sometimes, because of the perfection of them, called the seven spirits of God, and are compared to seven lamps of fire burning before the throne, Revelation 4:5 or else the ministers of the Gospel, who are the lights of the world:
and they shall light the lamps thereof; Aaron and his sons, the priests in successive generations:
that they may give light over against it to the table of shewbread, which was opposite to it on the north side of the tabernacle, and so by the light of these lamps the priests could see to place the shewbread in its order; or the candlestick itself, the lamps being so placed as to give light to the whole body of it, that it might be seen in all its parts very distinctly; unless it can be thought that these lamps were separate from the candlestick, and set around the sides of the holy place, and gave light to it: and this may rather seem to be the case, since these lamps are spoken of after the whole of it is said to be one beaten work of pure gold; but then we have no account of the lamps of the candlestick, unless they are supposed to be included in the branches; wherefore the first sense seems best.

they shall light the lamps . . . that they may give light--The light was derived from pure olive oil, and probably kept continually burning (compare Exodus 30:7; Leviticus 24:2).