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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/11567

Title: A framework for predicting the non-visual effects of daylight - part I: photobiology-based model
Authors: Andersen, Marilyne
Mardaljevic, John
Lockley, S.W.
Issue Date: 2012
Publisher: Sage, published in Association with The Society of Light and Lighting (© The Chartered Institution of Building Services Engineers)
Citation: ANDERSEN, M., MARDALJEVIC, J. and LOCKLEY, S.W., 2012. A framework for predicting the non-visual effects of daylight - part I: photobiology-based model. Lighting Research and Technology, 44 (1), pp.37-53.
Abstract: This paper investigates the formulation of a modelling framework for the nonvisual effects of daylight, such as entrainment of the circadian system and maintenance of alertness. The body of empirical data from photobiology studies is now sufficient to start developing preliminary non-visual lighting evaluation methods for lighting design. Eventually, these non-visual effects have the potential to become a relevant quantity to consider when assessing the overall daylighting performance of a space. This paper describes the assumptions and general approach that were developed to propose a modeling framework for occupant exposure to non-visual effects of light, and presents a novel means of visualising the ‘circadian potential’ of a point in space. The proposed approach uses current outcomes of photobiology research to define – at this point static – threshold values for illumination in terms of spectrum, intensity and timing of light at the human eye. These values are then translated into goals for lighting simulation, based on vertical illuminance at the eye, that – ultimately – could become goals for building design. A new climate-based simulation model has been developed to apply these concepts to a residential environment. This will be described in Part 2 of this paper.
Sponsor: The authors acknowledge the support of the Velux Corporation who commissioned this study, and in particular the contributions and input of Nicolas Roy and Jens Christoffersen. Marilyne Andersen was also supported by the Ecole Polytechnique Federale de Lausanne and John Mardaljevic by De Montfort University.
Version: Accepted for publication
DOI: 10.1177/1477153511435961
URI: https://dspace.lboro.ac.uk/2134/11567
Publisher Link: http://dx.doi.org/10.1177/1477153511435961
ISSN: 1477-1535
Appears in Collections:Published Articles (Architecture, Building and Civil Engineering)

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