The biggest revelation I've had regarding interior design is to stop using overhead lights. Anyone who has ever worked in the games industry will tell you that lighting is the most important element of what makes a scene look a certain way. The crazy thing about lamps is you can put them anywhere. They only use a constant amount of power regardless of scene complexity. Lighting in my GPU is definitely more expensive.

When everything in your house is illuminated from point lights stuck in holes in the ceiling, you only get a visual hierarchy along an axis you mostly cannot use (Y/up/down). When the lights are positioned at vertical midpoints, you get visual hierarchy on the X-Z (horizontal) plane which is generally how we are viewing our environment. The layering of shadow and highlights across a room are a lot less stressful to interpret. You can use a lot less total light and still convey required detail in the scene.