Daylight design offers an opportunity to control the use of natural light in and around buildings. Defined as a daylight design strategy, we can design glazing and its ability to provide light into a building. This is often for a combined justification of occupant comfort, energy efficiency and aesthetic reasons. As glazing is a naturally reflective material, we also design light for external needs, often to decrease light reflections for public safety.
We use the term optics to technically describe the study of daylight, which in the discussion of building envelopes, is ‘visible light’ to the human eye. The visible light spectrum is a relatively narrow part of the total electromagnetic spectrum, covering the wavelengths between 380 – 780 nm.
When light strikes the external surface of glazing, light components are reflected, absorbed and transmitted depending on the properties of the glazing; it's surface, the respective wavelength and the angle of incidence. We perceive light visually, while it can also be perceived in the form of heat as it comprises approximately half of the heat we receive from the sun.
Read More: Daylight Design - Advanced