One of the primary aspects of the concept of sustainability is the reduction in the need for artificial light sources with the natural lighting method often used in vernacular architecture. Artificial light sources are often used in interior spaces as a result of the developments in the lighting technology. Lighting products using modern technology harm the environment during the production stage and following the expiry of their lifecycle and also cause problems as waste. Moreover, most use a technology that is far from being sustainable. They harm the environment as waste after their lifecycle expires. Examining examples of architecture constructed with modern construction methods and where natural lighting is used to the maximum extent, it is observed that daylight is preferred in interior spaces due to being more economic, healthy and environmentally friendly. However, the variety of methods used to receive natural light into interior spaces also sets the architectural character of the building. This study discusses selected examples of vernacular architecture to underline the natural lighting techniques that support the notion of sustainability. The study describes the effect of natural lighting on interior space and then examines the relationship between vernacular architecture and the natural lighting technique. The subject is described under topics such as vertical and horizontal window apertures as the method for receiving light into the interior space and the yard system, and the various modes of architecture observed in various climate regions are interpreted in the context of sustainability.
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