A Review of Theoretical Approaches to Light Therapy in Therapeutic Spaces

Introduction: Hospital design is generally accepted as a complex task in functional dimensions. The present study examines the effect of daylight on the design of therapeutic spaces to create an effective treatment environment. This research aimed to acquaint the policy-makers of therapeutic spaces with the determining role of daylight and its related challenges. Method: To comprehend the intellectual, structural, and dynamic patterns of bibliographic backgrounds in this field of research, 121 related research were reviewed from valid research databases. Results: Studies are divided into four main categories: The first group of studies focuses on the role of natural light in improving the performance of the building (providing quality for the indoor environment and reducing energy consumption). The second group of studies focuses on the role of natural light in improving patients' health (mental and physical health). The third group considers the role of natural light in improving the efficiency of medical staff and the fourth group considers the role of natural light in alleviating environmental pollution. Conclusion: Review of the related literature shows that enhanced access to daylight in medical spaces is associated with reduced energy consumption, improved efficiency of health care delivery, and shortening the length of hospital stay. Optimizing medical spaces on this basis, in addition to satisfying users, will significantly reduce the cost of health care and positively impact the economic sustainability of these spaces.