![]() ![]() This light is a fraction of incident light on the surface and depends on each object’s relative reflectance value. The source of daylight is also immensely bright, and direct viewing with the naked eye for more than a few seconds could cause eye damage. In an outdoor environment, people experience sunlight indirectly through the reflection of light off nearby surfaces. Daylight is an inherently dynamic source-its location and intensity changes with time of day, seasons, and weather. Compared with designing for electrical lighting, which is static and makes it relatively easier to establish a lighting layout, designing for daylight requires a strategy that works across a wide variety of daylight conditions and site-specific factors (Figure 2). While there are many benefits to designing with daylighting in mind, it also presents complex challenges. Additionally, daylight has incredible color-rendering properties that can make the architectural finishes, interior furniture, or artwork look more vivid. Providing daylight with windows also offers views to the exterior, which increases occupants’ productivity and satisfaction with the environment. Daylight also can be used to enhance the overall architectural experience due to its high color-rendering properties as a primary source of illumination to create a dynamic atmosphere (Figure 5). ![]() The health benefits and the human desire for daylight are intuitively based on human evolution over the ages, and there is plenty of research demonstrating the effect of daylight on human health including its effect on our circadian rhythm-the regulation of our sleep/wake patterns and other important biological processes. The energy codes and regulations tend to focus on the energy-saving aspects of daylighting, and often the visual comfort and occupant visual satisfaction is not part of the criteria. If measures for visual comfort are not considered, occupants will override the daylight system. For example, an occupant could pull the shade down as a result, the intended energy-savings goal will not be met.ĭaylight also has many subjective benefits that increase the quality of the interior environment. Consequently, some spaces lost their access to the outside view, leading to occupants’ dissatisfaction due to losing their visual connection to the outside environment and natural landscape. Using daylight has gained more attention recently because of its significant benefits, including being the most sustainable source of energy. The architectural layout of significant preindustrial buildings ensured that most enclosed spaces had access to daylight to reduce the use of candles, oil lamps, or gaslight. In the preindustrial era, the daylighting design was based on the past experience of the designer/builder or general guidelines. The introduction of electrical lighting transformed the architectural plan-without the necessary access to daylight. Understand the daylighting design process is responsive to human visual comfort.īefore the advent of electrical lighting, daylight was the prominent source of illumination in buildings.Know what tools and metrics can be used to evaluate visual comfort.Learn about daylighting benefits and daylighting glare. ![]()
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