ABSTRACT
There are many factors influencing in the control of indoor visual comfortable environment, generally including architectural factors and nonconstruction factors, such as illumination intensity, solar radiation, climate, lamps as well as their power, windows’ orientation and size, area ratio between the window and wall, indoor reflectance,
1 INTRODUCTION
The issued Directive 2010/31/EU of the European Parliament and Council of 19 May 2010 on the energy performance of buildings requires all new buildings to be “Nearly Zero Energy Buildings” (NZEB) by 2020 (EPBD, 2010), thus the energy efficiency of building environment has been the top priority (Nielsen 2011). According to recent studies, lighting energy consumption represents between 40% and 70% of total energy consumption within the tertiary sector, and moreover, it is expected that this consumption will increase in the future (Alcalde 2012). At this regard, energy efficiency in lighting is one of the key elements of nearly zero-energy buildings.
