Hanieh Haghighatpanah Rastekenari - The master student of interior architecture, Lahijan Branch, Islamic Azad University, Lahijan, Iran.
Behnaz Nabavi - The master student of architecture, Rasht Branch, Islamic Azad University, Rasht, Iran.
Mohammadhadi Shabanzadeh Delcheh - The master student of architecture, Rasht Branch, Islamic Azad University, Rasht, Iran.
Zahra Poursafar - Department of Architecture, Fouman and Shaft Branch, Islamic Azad University, Fouman, Iran.

Light is one of the factors affecting the spatial value, and this factor is significant because it is capable of influencing other features of space. Using natural and artificial light can have remarkable impact on the quality of space, and the designer s disregard for how light interferes in space can make the value and definition of space ambiguous.Getting approaches for designing a relaxing space in relation to nature that provides natural light to the inhabitants of the buildings is as important as the architectural beauty of buildings. This paper aims to investigate the role of application of light in the architecture of spaces, use of light in design and creation of suitable spaces, as well as the relationship of environment and surrounding areas with mental health and ethical observance, given the great importance and impact of environment on human beings, through descriptive research in order to improve the quality of internal architecture and this will help designers consciously design a healthier environment. And this will help designers consciously design a healthier environment.

Natural light, Interior spaces, Architecture