In addition your light fixture may require mounting to a ceiling joist or to two short blocks nailed.
Run wire above ceiling joist no attic.
If there is access above the light in an attic or kneewall space you can remove the wire from the existing fixture box and install it in a junction box.
If you drill holes in the joists and run wire through those holes you ll be disturbing the insulation.
Worst can you open the ceiling 5 inches from the wall and work from there.
If there is any attic space at all or you get lucky with the joist bays you will likely be able to fish a.
Running electrical wire through the channel between ceiling joists is generally easiest.
The access is 14 because it s constrained by the 16 centers of the ceiling joists.
If you have an existing drywall ceiling however or you plan to finish out the ceiling with drywall you must make.
If the wires are within 7 of the attic access hole or along any attic flooring you ll need.
A 3 inch strip of drywall is enough to run receptacles around a room.
You can then splice on a new piece of wire make sure it is the same wire gauge and run the new piece from the junction box back to the fixture box.