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Tubular Daylight Guidance Systems (Including Erratum 1)

CIE 173:2012

ISBN 978 3 902842 40 4

Tubular daylight guidance systems are linear devices that channel daylight into the core of a building. They consist of a light transport section with, at the outer end, some device for collecting natural light and, at the inner end, a means of distribution of light within the interior. Collectors may be either mechanical devices that actively focus and direct daylight (usually sunlight), or be passive devices that accept sunlight and skylight from part or whole sky hemisphere. The transport element is usually a tube lined with highly reflective or prismatic material or may contain lenses or other devices to redirect the light. Light is distributed in an interior by output components, commonly diffusers made of opal or prismatic material. The major emphasis of this Report is on passive zenithal systems, the most commercially successful type of daylight guidance being installed in many parts of the world.
The Report includes a contextual review of the technology of all generic types of daylight guidance system. The major part of the report is concerned with photometry of components and systems, design methods, maintenance issues in both design and use, energy aspects, cost and benefits, human factors and architectural issues in the context of passive zenithal systems. The report includes case studies showing good practice.
This publication corrects and replaces CIE 173:2006 "Tubular Daylight Guidance Systems".
An Erratum is included that shows a corrected value in Table 3 and a corrected formula in Appendix C.
The publication is written in English, with a short summary in French and German. It consists of 75 pages with 44 figures and 5 tables and is readily available at the National Committees of the CIE or via the CIE Webshop.
The Erratum is freely downloadable from the CIE Website.

The following members of TC 3-38, "Tubular daylight guidance systems" took part in the preparation of this technical report. The committee comes under Division 3 "Interior Environment and Lighting Design".

Members:

  • Aizenberg, J. Russia
  • Bracale, G. Italy
  • Bottiglioni, S. Italy
  • Callow, J. United Kingdom
  • Carter, D. United Kingdom (Chair)
  • Edmonds, I. Australia
  • Ford, B. United Kingdom
  • Fontoynont, M. France
  • Hansen, V. Australia
  • Lee, E. South Korea
  • Mingozzi, A. Italy
  • Muneer, T. United Kingdom
  • Payne, T. United Kingdom
  • Pohl, W. Austria
  • Rosemann, A. Germany
  • Shao, L. United Kingdom
  • Tsangrassoulis, T. Greece
  • Whitehead, L. Canada

Corresponding members:

  • Jenkins, D. United Kingdom
  • Kolas, T. Norway


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