Detailed simulations of lighting and HVAC energy consumption were performed on a prototype office building in six North American climates. The goal of these simulations was to calculate the overall energy savings attributable to reductions in lighting power density (LPD) from 25.8 W/m (past practice) to 17.2 W/m (current code) to 8.6 W/m (low). Results showed that as LPD decreases, reductions i...

background in modern education, physical space is considered as a dynamic factor in students' educational activities. this study was conducted to investigating the impact of lighting educational spaces on learning and academic achievement of elementary students. materials and methods at a cross-sectional study (2015-2016), a total of 210 students were selected randomly as sample of study. ...

Lighting, and its emergence as a digital and networked medium, represents an ideal platform for conducting research on both sensor and human-derived methods of control. Notably, solid-state lighting makes possible the control of the intensity, spatial, and color attributes of lighting in real-time. This technology provides an excellent opportunity to conduct new experiments designed to study ho...

To judge the quality of a lighting installation is to determine how well it meets context-specific goals in the areas of architecture, economics, and individual wellbeing. The goals for individual well-being are behaviours such as task performance, mood, social behaviour, aesthetic judgements and satisfaction, that occur as a result of internal processes influenced by luminous conditions. These...

Emergency l ight ing systems are frequently employed as a required safety feature within business premises. These systems comprise essentially of a control circuit, a battery pack, a trickle charging circuit, and either an in-built incandescent lamp, or an inverter that will allow the battery supply to drive the existing fluorescent tubes. It is the latter version, and the requisite DC-AC inver...