This issue is sponsored by the Philips Romania, Lighting Division

RECENT DEVELOPMENTS IN DAYLIGHT GUIDANCE SYSTEMS
David CARTER
School of Architecture, University of Liverpool
Daylight guidance has over the past few years become an exciting addition to the lighting
designer’s range of options. Little authoritative design guidance currently exists for this
technology but this gap is about to be plugged by a new Commission Internationale de
I'Eclairage (CIE) Report that is now available. David Carter, the Chairman of the CIE
committee that produced the report, explains what to expect in the document and also
describes some interesting new work on how to configure daylight guidance systems to
give maximum user satisfaction.
Keywords: daylight, daylight guidance, design, human response to daylight.
Introduction
Daylight guidance technology redirects
daylight into areas of buildings that cannot
be lit by conventional glazing. They consist
of a light transport section with, at the outer
end, a device for collecting natural light
Figure 1
INGINERIA ILUMINATULUI 18-2006
and, at the inner end, a means of
distribution of the light within the interior.
Light collection is usually at roof level
either by ‘heliostats’ that actively track and
focus sunlight, or passive devices that
accept sunlight and skylight from the whole
sky (see Figure 1).