Exodus 25:35

A bulb shall be under each of the six pair of branches coming out of the lamp stand.

Treasury of Scripture Knowledge

Summary

And there shall be a knop under two branches of the same, and a knop under two branches of the same, and a knop under two branches of the same, according to the six branches that proceed out of the candlestick.

Bible References

General references

Exodus 31:4
This is for planning skillful designs and working them in gold, silver, and copper.
Exodus 37:21
A blossom was placed where each pair of branches came out from the lamp stand.
Exodus 40:24
He placed the lamp stand in the tent of meeting opposite the table, on the south side of the tent.