Integrating LED lighting design strategies with side daylighting systems to improve interior lighting design of office buildings

摘要

A high contrast ratio between windows and surrounding walls may lead to office workersudvisual discomfort that could negatively affect their satisfaction and productivity.udConsequently, occupants may try to adapt their working environment by closing blinds and/udor turning on the lights to enhance indoor visual comfort, which can reduce predicted energyudsavings. The hypothesis of this study is that reducing luminance contrast ratio on the windowudwall will improve window appearance which potentially will reduce visual discomfort anduddecrease workers interventions. Thus, this PhD research proposes a simple strategy touddiminish the luminance contrast on the window wall by increasing the luminance of theudareas surrounding the windows using supplementary light emitting diode (LED) systems. To test the hypothesis, this investigation will involve three experiments in different office layouts with various window types and orientations in Brisbane, Australia. It will assess user preferences for different luminance patterns in windowed offices featuring flexible, lowpower LED lighting installations that allows multiple lighting design options on the window wall. Detailed luminance and illuminance measures will be used to match quantitative lighting design assessment to user preferences.