We use about 6'6" to center or maybe 7' to center of the j-box.
Depends on if you want to see the front of the fixture or the bottom of the fixture. Can you see what the fixture looks like before you rough in? What looks better, the front or the bottom?
If the front looks better use the 6'6" to center measurement. If the bottom looks better use the 7' to center measurement.
Some of those wall sconts lights have an open bottom and you can see the light bulb if it is mounted too high. Not good.
My opinion
Tev
