Journal•ISSN: 1477-0938
Lighting Research & Technology
SAGE Publishing
About: Lighting Research & Technology is an academic journal. The journal publishes majorly in the area(s): Daylight & Luminance. It has an ISSN identifier of 1477-0938. Over the lifetime, 1876 publications have been published receiving 30515 citations.
Topics: Daylight, Luminance, Glare (vision), Daylighting, Illuminance
Papers published on a yearly basis
Papers
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TL;DR: A new paradigm to assess daylight in buildings called ‘useful daylight illuminance’, or UDI, is introduced, founded on an annual time-series of absolute values for illuminances predicted under realistic skies generated from standard meteorological datasets.
Abstract: This paper introduces a new paradigm to assess daylight in buildings called ‘useful daylight illuminance’, or UDI. The UDI paradigm preserves much of the interpretive simplicity of the conventional...
484 citations
TL;DR: In this article, the authors validate and extend present knowledge of the degree and kind of manual control strategies of blinds and electric lighting systems that are used in private and two-person offices.
Abstract: This paper reviews, validates and extends present knowledge of the degree and kind of manual control strategies of blinds and electric lighting systems that are used in private and two-person offices. A new monitoring setup was applied from March to December 2000 in 10 daylit offices in Germany that featured manually operated electric lighting and automatically controlled external venetian blinds with manual override. The data shows that individuals consistently followed the same control strategy for their electric lighting and blinds. Groups of individuals tended to activate their electric lighting according to Hunt’s probability function, although there was a large spread between individual control levels. All subjects used their blinds to avoid direct sunlight above 50 W/m2, and incoming solar gains above 50 klux (~450 W/m2). They also were more willing to accept automatic blind opening than closing.
333 citations
TL;DR: In this paper, the authors review the historical basis of current compliance methods for achieving daylit buildings, propose a technical basis for development of better metrics, and provide two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.
Abstract: The drive towards sustainable, low-energy buildings has increased the need for simple, yet accurate methods to evaluate whether a daylit building meets minimum standards for energy and human comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor of occupants comfort or interventions. This paper reviews the historical basis of current compliance methods for achieving daylit buildings, proposes a technical basis for development of better metrics, and provides two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.
320 citations
TL;DR: In this paper, the potential, limitations and applicability of the high dynamic range (HDR) photography technique are evaluated as a luminance mapping tool, and the camera response function was computationally derived by using Photosphere software, and was used to fuse the multiple photographs into an HDR image.
Abstract: In this paper, the potential, limitations and applicability of the High Dynamic Range (HDR) photography technique are evaluated as a luminance mapping tool. Multiple exposure photographs of static scenes were taken with a commercially available digital camera to capture the wide luminance variation within the scenes. The camera response function was computationally derived by using Photosphere software, and was used to fuse the multiple photographs into an HDR image. The vignetting effects and point spread function of the camera and lens system were determined. Laboratory and field studies showed that the pixel values in the HDR photographs correspond to the physical quantity of luminance with reasonable precision and repeatability.
259 citations
TL;DR: In a double-blind cross-over design, the average incidence of headaches and eyestrain was more than halved under high-frequency lighting and headaches tended to decrease with the height of the office above the ground and thus with increasing natural light.
Abstract: The weekly incidence of headaches among office workers was compared when the offices were lit by fluorescent lighting where the fluorescent tubes were operated by (a) a conventional switch-start ci...
241 citations