Suggestions for running wire through existing walls?

[quakerboy]

7. In between first and second floor

There is some space in between, in theory. Only problem, i just realized the ceiling area is between my hallway and the floor of my neighbors closet. So.. im not sure whats up there in between.

The wire actually will need to go from an existing ceiling fixture, basically rerouting power from there to a strip of leds that will run below a railing, providing much better visibility in a dark stairway. I suppose I should pull down the fixture and see if theres anything to be seen above it.

That's a good thought on the ceiling box. Though, if anyone wanted to put a fan in that particular spot, they would deserve what they got. the entryway to a stairwell, small space, not at all a high ceiling.