Stand in your living room this evening and turn on only the ceiling light. This is the light most homes are lived in by, and it is doing to the room exactly what it does to the faces in it: flattening, shadowing the eyes, filing the evening under general illumination. Now turn it off and switch on every lamp instead. The room that appears is the same room, rearranged into places — a pool here, a glow there, corners allowed to recede. That is the entire doctrine, witnessed in one minute.
The method has three layers, none requiring an electrician. Low sources first: table and floor lamps at seated eye level or below, because light below the eyeline reads as evening and light above it reads as institution. Warmth second: 2700 kelvin at most, and 2200 in the lamps you use late, so the colour of the light matches the hour. Multiplication third: three to five small sources beat one bright one, because a room lit from several low points has depth, and depth is what makes people settle.
“Light below the eyeline reads as evening; above it, institution.”
Spread the sources by task — one for reading, one on the sideboard, one small and nearly ornamental on a shelf, dimmers wherever offered. The overhead survives for cleaning and searching, which is honest work, but its switch stops being the default. Budget for this what you would spend on one decent chair; light is the cheapest renovation there is. A room lit low and warm flatters everyone and rushes no one. The evening deserves lighting that agrees with it.