Light is a principal design element in architecture. Light has a major impact on inhabitant comfort, aesthetics, and environmental efficiency of a building. Besides the choice of materials, a good understanding and careful design of lighting can help to control the effective geometry of the space. 

With an enormous range of lighting fixtures and artificial lighting effects, we sometimes forget about natural lighting effect such as daylight. Indirect sunlight makes spaces to feel most comfortable, so it is very important to plan the orientation of the opening, considering cardinal directions of the building. Remember that sun will move during the day creating different shadows.