Concept

Illuminance

Related publications (25)

Optimized office lighting advances melatonin phase and peripheral heat loss prior bedtime

Jean-Louis Scartezzini, Mirjam Münch, Marta Benedetti, Lenka Maierova

Improving indoor lighting conditions at the workplace has the potential to support proper circadian entrainment of hormonal rhythms, sleep, and well-being. We tested the effects of optimized dynamic daylight and electric lighting on circadian phase of mela ...

2022

Visual comfort without borders: Extending daylight glare prediction to dim daylit environments

Geraldine Cai Ting Quek

Avoiding discomfort glare is one of the critical aspects of maintaining visual comfort, which significantly influences occupants' overall satisfaction with their indoor environment. Discomfort glare prediction models have been developed for various lightin ...

EPFL2022

A comparative study of indoor environmental quality in temporary emergency shelters

Patrick Bonzi

Extreme natural or man-made disasters are events caused by factors that injure, displace people and damage property. Victims of such events are often forced to live in temporary emergency shelters for prolonged time. It is therefore important to evaluate t ...

2020

Shaping light to influence occupants’ experience of space: a kinetic shading system with composite materials

Marilyne Andersen, Anastasios Vassilopoulos, Jan Wienold, Joëlle Baehr-Bruyère, Kynthia Chamilothori

Adaptive kinetic façades are systems capable of modifying their shape to optimize their behavior regarding real time outdoor and indoor conditions. They are typically evaluated based on quantifiable physical parameters such as illuminance levels, with litt ...

IOP Publishing2019

Influence of indoor temperature and daylight illuminance on visual perception

Marilyne Andersen, Jan Wienold, Giorgia Chinazzo

This paper details the results of an experimental study investigating the combined effect of indoor temperature (19 ℃, 23 ℃ and 27 ℃) and horizontal illuminances (∼140 lx, ∼610 lx and ∼1440 lx) on visual perception, with daylight as the only source of ligh ...

2019

A smart luminaire in an office environment: impact on light distribution, user interactions and comfort

Jérôme Henri Kämpf

A smart luminaire able to change the direction of its light beam is installed in an office environment and compared to the available LEDs fixtures. Standard lighting measures are performed and a controlled user experiment is conducted, involving 22 subject ...

IOP Publishing Ltd2019

Daylight and temperature in buildings: interaction effects on human responses

Giorgia Chinazzo

Over the past years, increasing efforts have been devoted to understand how people perceive the indoor environment with the goal to improve building design and operation. Studies have separately addressed the effects of the four main aspects that influence ...

EPFL2019

Toward proper evaluation of light dose in indoor office environment by frontal lux meter

Jean-Louis Scartezzini, Ali Motamed, Maira Vieira Dias

The wearable Brazilian illuminance meter “OcuLux” provides the opportunity to monitor continuously pupilar illuminance for indoor environment. The device is calibrated to evaluate the illuminance in lux for the range of 0 to 3500 lux with 23% of precision. ...

Elsevier2017

Sensitivity analysis of visual and thermal parameters for energy savings: combining illuminance and temperature set-points for possible trade-offs

Marilyne Andersen, Jan Wienold, Joshua Pereira, Giorgia Chinazzo, Mathieu Plourde

This study presents a methodology for evaluating the effects of simultaneous temperature and illuminance set-point variations on energy consumption. Different illuminance levels are achieved with an innovative dynamic shading control algorithm that allows ...

2017

Effects of visual and thermal stimuli interactions on comfort perception

Marilyne Andersen, Jan Wienold, Giorgia Chinazzo

In industrialized countries, people spend on average 85-90% of their time indoors (1). For this reason, major efforts are being made to understand and control the factors which affect people’s comfort, health and well-being inside buildings (2). The indoor ...

2017

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