Reflective surfaces and daylight

A window admits a fixed amount of light. What changes the experience of a room is how much of that light bounces back into the space rather than being absorbed. Light surfaces return more; dark surfaces absorb more. This is why two rooms with identical windows can feel completely different once they are decorated.

The ceiling does the most work

The ceiling is usually the largest unbroken surface in a room and sits where light reflected off the floor and walls collects. A pale matte ceiling acts as a soft secondary source, spreading light evenly downward. Keeping the ceiling lighter than the walls is one of the simplest ways to lift the overall sense of brightness.

Walls: pale and matte

Pale wall colours reflect more visible light than deep ones, and matte finishes scatter that light evenly across the room. A glossy wall, by contrast, reflects light in a single direction, which often shows up as a bright hotspot and glare rather than gentle fill. For daylight depth, a matte finish in a light tone is generally the dependable choice.

Floors and furniture

Floors receive direct light near the window and can bounce it back toward the ceiling. A light timber or pale floor near the window reinforces this; a dark floor absorbs it. Tall, dark furniture placed on the window wall casts the rest of the room into its own shadow, so keeping the area beside the window low and light pays off.

Mirrors and glass

A mirror placed on a wall adjacent to a window can redirect a shaft of daylight into a darker corner, effectively doubling the visible opening from some viewpoints. Glazed internal doors and open shelving let light pass between rooms rather than stopping at a solid partition — useful in deeper apartment layouts.

A quick comparison

Working sources

• Reflectance — Wikipedia
• Diffuse reflection — Wikipedia
• Daylighting — Wikipedia

Continue with window orientation or seasonal daylight across the year.