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Effect of temperature and light source type (natural/artificial) on visual comfort appraisal : Experimental design and setting
Vincent Berrutto*, Marc Fontoynont*, Jean-Marie Fourmigué**
* Département Génie Civil et Bâtiment URA CNRS 1652
Ecole Nationale des Travaux Publics de l?Etat, 69518 Vaulx-en-Velin Cedex, France, E-mail : Vincent.Berrutto@entpe.fr
** Direction des Etudes et Recherches, Electricité De France, BP 1, 77250 Moret sur Loing, France
Abstract
An experimental design is described to test the hypothesis that temperature and light source type have an effect on visual comfort appraisal. It is proposed that thirty subjects evaluate visual comfort after reading a text in two temperature conditions (21°C and 27°C in summer) and three light source types (clear sky, 4000 K fluorescent lamps, and combined light source), under a constant 300 lux (± 30 lux) illuminance level. Two test rooms have been completed to control and monitor thermal and visual parameters. It is expected that subjects accept lower light levels at higher temperatures, especially when light is natural.
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