John Gill Commentary Exodus 40:25

"And he lighted the lamps before Jehovah; as Jehovah commanded Moses." — Exodus 40:25 (ASV)

And he lighted the lamps before the Lord
The seven lamps belonging to it: this, though it was the business of the priests of Aaron, and his sons, yet they not being at present invested with their office, was done by Moses, who in this and several other things mentioned in this chapter officiated as a priest:

as the Lord commanded Moses ,
(Exodus 25:37) .