Authors: Borisuit, Apiparn; Scartezzini, Jean-Louis; Thanachareonkit, Anothai

Source: Architectural Science Review, Volume 53, Number 4, 2010 , pp. 359-373(15)

Publisher: Earthscan

Abstract:

The integration of daylighting and electric lighting systems within buildings (also designated as `green lighting') is a recent issue for the lighting research community: it allows achieving better lighting conditions for building occupants, in particular within office rooms. Besides the substitution of electric light, daylighting can contribute in a significant way to improve the users' visual comfort and performance, with a large variety of novel daylighting systems and components being developed in recent years. In order to demonstrate this, an anidolic daylighting system combined with several electric lighting fixtures was set up in an office room of the LESO solar experimental building located on the EPFL campus in Lausanne (Switzerland). Three different electric lighting modes, involving recessed luminaries (direct lighting), floor lamps (indirect lighting) and desk lamps (task lighting), were considered for that purpose. Luminance contrasts and glare indexes in the occupants' view field were monitored and compared in the office room, both in the presence and absence of daylight and for different sky conditions; the latter was achieved through luminance mappings based on high dynamic range imaging techniques. The energy performance of electric lighting systems was also considered, together with the qualitative aspect of lighting, in order to outline the main features that characterize an optimal integration of daylighting and electric lighting systems.

Keywords: Advanced daylighting systems; digital imaging techniques; electric lighting; glare indexes; high dynamic range; luminance mapping; luminance ratios

Document Type: Research article

DOI: http://dx.doi.org/10.3763/asre.2009.0094

Publication date: 2010-11-01

More about this publication?

• Editor in Chief: Richard Hyde, University of Sydney, Australia

  Founded at the University of Sydney in 1958 by Professor Henry Cowan to promote continued professional development, Architectural Science Review presents a balanced collection of papers on a wide range of topics. From its first issue over 50 years ago the journal documents the profession's interest in environmental issues, covering topics such as thermal comfort, lighting, and sustainable architecture, contributing to this extensive field of knowledge by seeking papers from a broad geographical area.

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