More elements come into play to determine the quality of light in your living room, as you can imagine. Certainly, maximum light is not always the goal, but well done, good LED flash light for living room can make the difference between a room you like and just don't use.
Leave the start with built-in boxes. The living room is not the place to install a large light grid covering every square foot in the room. Think instead of accentuating lighting and lighting tasks.
A good lighting plan will include wall washers for key sectors where art could be featured.
Consider a small grid in the main seating area for tasks like reading, games, etc.
Make sure you have all the lights on the dimmers to control the atmosphere at the end.
Wall sconces are an excellent alternative to lamps. The aft mirror can be rough and save wall space, but it gives you a very desirable quality of light.
In rooms without accent boxes, indirect lighting can provide the atmosphere of the wall washer without having to bother breaking the ceiling. Consider concealed lighting over tall cabinets or high floor lights behind large furniture.
Standard and table lamps should be scattered throughout the room so that, apart from any other light, they can illuminate the room reasonably on most occasions.
The size of the room will ultimately determine the number of lamps, but if you have another light source, three lamps are a lot to consider, like a floor lamp. Note that dark shadows limit the overall light output of the lamp.