EK404 is operated by a B777 in which case the lights are usually inserted in a strip in the floor (Airbus prefer to mount them on the side of the seat supports). They are not particularly apparent until they are switched on.
What is less brought out is that the lights change from white to red alongside the emergency exit. Yet if you are crawling along under the smoke following the lights this is crucial information. I've never done this in an aircraft but have in a building fire, it is astounding how the visibility goes in the smoke but is much improved in the few inches above the floor. Hence the lights.
Very few airlines now demonstrate the switching on of the lights. I remember that British Midland, following the Kegworth 737 accident where the lights became an issue, as part of the safety briefing always used to say the lights will come on, LOOK, like this, whereupon they would demonstrate them. I believe the aircraft had a wiring mod done to allow the crew to do this easily during the briefing.
They did this for some years but now BMI have stopped too. Bet their current Director of Ops wasn't there at the time of Kegworth (comments from BMI crew maybe ?)
BTW, Trikeflyer, it's not foolish to listen to the safety briefing each flight. It's foolish NOT to do so. Wonder how many pax would approve if the pilots said "can't be bothered to do the safety checks today" at the start of the flight.