Below Useful Daylight Illuminance (BUDI): a new useful range measurement parameter (original) (raw)

2019 SBFoton International Optics and Photonics Conference (SBFoton IOPC)

Abstract

Light plays an important role in life cycle: light is a normative issue and a common use requirement which helps the perception and apprehension of formal and conceptual aspects. Specifically, in respect to the relationship between user and light, there are intrinsic physiological and psychological issues leading to an understanding between the threshold of human comfort and discomfort. The existing methods measure light at normal state of use and location, that is, they do not usually consider an exceptional condition. In special situations, a small amount of light can be judged inadequate under standards established by regulation; however, in a situation with lack of light, that minimum amount of illuminance, can offer a positive effect. This paper is a part of a methodological research and has as objective analyze a new assessment range, developed from the Useful Daylight Illuminance (UDI), based to justify the range below 100 lux of illuminance in the constructed environment natural lit, considering this still could be a valuable light.

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