your plaster ceiling should have a hole to access to the inside of the ceiling for wiring and maintenance, electrician will drill a hole in your plaster ceiling and extend the wire then use a guiding wire to pull live wire to its destination

just like how they pull telephone/fiber cable without hacking the concrete floor

you cant use downlight if you dont have plaster ceiling, instead of going for tube light or big dome light, you can go for LED track light or fixed spotlight that still allow you to rotate the position but not as flexible as track light

it is best if you can install 2 set of track lights with different switch, 1 switch to turn on the track for white lights and another switch to turn on the tracks for dimmer yellow lights when you need it

personally i used tube light and fixed spotlights at my living room, i find that 3 LED spotlights give better lightning compare to CFL tube, and i have to remove one of the LED to reduce the brightness, the rest of the LED point to the ceiling to diffuse the lights around my living room, even when i sleep on my sofa with lights on, it does not appear glaring to my eyes

another downside of using LED downlight is that if you place them directly above sofa, it's brightness might be glaring when you look up or taking a nap with lights on and you can adjust them like track lights