This episode discusses the traditional lighting rules (general, task and accent lighting), why they are misleading, and how to use lighting to create a comfortable sense of space.
Most decorating shows will tell you to include
(1) general lighting
(2) accent lighting and
(3) task lighting.
But these recommendations are propagated by light manufacturers.
General guidelines for lighting if you want to create a comfortable sense of space:
Table and floor lamps can provide general lighting and task lighting for most spaces.
Have at least three table or floor lamps. This eliminates most stark shadows.
Arrange your furniture and tables to pull your lamps toward the center of the room. Try to have them at your conversation circle.
More lights with lower lumen bulbs are better than fewer lights with higher lumen bulbs. Check the lighting in almost any swanky restaurant or bar to see this.
References:
Sense of Space
Basic Furniture Arrangement