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The useful daylight illuminance calculation is based on three factors—the percentage of time a point is below, between, or above an illuminance value. The range for these factors is typically 100–2,000 lux. Useful daylight illuminance is similar to daylight autonomy but has the added benefit of addressing glare and thermal discomfort. [44]
The history of electric light is well documented, [11] and with the developments in lighting technology the profession of lighting developed alongside it. The development of high-efficiency, low-cost fluorescent lamps led to a reliance on electric light and a uniform blanket approach to lighting, but the energy crisis of the 1970s required more design consideration and reinvigorated the use of ...
In architecture, a daylight factor (DF) [1] is the ratio of the light level inside a structure to the light level outside the structure. It is defined as:
In architecture, spatial design, literary theory, and film theory—affective atmosphere (colloquially called atmosphere) refers to the mood, situation, or sensorial qualities of a space. [1] Spaces containing atmosphere are shaped through subjective and intersubjective interactions with the qualia of the architecture. [ 2 ]
The Daylight Award is awarded every second year since 2016 "to honor and support daylight research and daylight in architecture, for the benefit of human health, well-being and the environment. The award puts specific emphasis on the interrelation between theory and practice".
Daylight is the combination of all direct and indirect sunlight during the daytime. This includes direct sunlight , diffuse sky radiation , and (often) both of these reflected by Earth and terrestrial objects, like landforms and buildings.
Daylight used at the train station Gare de l'Est Paris. Daylighting is the oldest method of interior lighting. Daylighting is simply designing a space to use as much natural light as possible. This decreases energy consumption and costs, and requires less heating and cooling from the building.
Daylight harvesting systems use daylight to offset the amount of electric lighting needed to properly light a space, in order to reduce energy consumption. This is accomplished using lighting control systems that are able to dim or switch electric lighting in response to changing daylight availability.