What does He mean when He says "arrange the lamps" so that the lights "give light in front of the lampstand"? Why does it matter which way the flames from the lamps face?
The Menorah itself is highly symbolic. It represents the entire Word of God, which, according to Psalm 119:105 is the "Lamp unto our feet and the Light unto our path." There are 66 pieces that make up the lampstand itself. "Coincidentally," there are 27 pieces on the right side of the Menorah and 39 on the left when you include the center base of the candlestick. In the same way, there are 27 books of the New Testament and 39 in the Old, which is the foundation of the entire "candlestick." It also represents the 7 spirits of God, the 7 churches of Revelation, and the Torah itself, which is the instruction that brings light to the 7 continents.