I have a hanging/dropped ceiling in my house in the entrance. There is one electrical cable hanging by the side, waiting to be connected to a lamp.
This ceiling extends to the above of the stairs, and I want to install a motion-sensor lamp in the staircase. Battery-powered lamps just don't cut it, so I'm thinking of actual electric lamps, but I'm not sure how to run the cables or if it's possible without removing the wooden ceiling (or how to access the point in the actual ceiling where I can get more cables). This is a house in the Netherlands, if it helps in answering. The situation is as following where the red circle is the cable already in place and the blue arrow shows the location where I'd want a new cable, above the stairs.
Thanks!