Charles Ellicott Commentary Numbers 8:2

"Speak unto Aaron, and say unto him, When thou lightest the lamps, the seven lamps shall give light in front of the candlestick." — Numbers 8:2 (ASV)

When you light the lamps. —Better, When you set up the lamps .

The golden candlestick was placed against the south wall of the Tabernacle, opposite the table of shewbread, so that its seven branches were parallel to that wall, with its branches east and west. Consequently, the seven lamps, one resting on each of the seven branches, threw their light in front of the candlestick, that is, towards the north wall.

Through this arrangement, the furniture of the holy place was more effectively lit than it would have been if the candlestick had been placed facing the entrance, with its branches north and south.

Over against. —Or, in front of.