In some design instances, materials used on walls and furniture play a key role in the lighting effect< for example dark paint tends to absorb light, making the room appear smaller and more dim than it is, whereas light paint does the opposite. In addition to paint, reflective surfaces also have an effect on lighting design.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): What kind of paint makes a room a room look larger and brighter?
light paint