is there a typical rough-in height for the junction box for a wall sconce. i realize there are many styles and we haven't selected our fixtures yet. thanx
One factor that will be used to determine the height is the building code.
The building code calls for no less than 6' 8" of head room.
This will be imporant if the fixture is being installed in a hall or stairwell as the fixture can not encroach on the required width of these areas.