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Sithravel, R., Olsson, T. & Aries, M. (2024). Optimizing presence sensing lighting for energy efficiency and user behavioral needs in small Swedish homes. LEUKOS The Journal of the Illuminating Engineering Society of North America, 20(1), 107-125
Open this publication in new window or tab >>Optimizing presence sensing lighting for energy efficiency and user behavioral needs in small Swedish homes
2024 (English)In: LEUKOS The Journal of the Illuminating Engineering Society of North America, ISSN 1550-2724, E-ISSN 1550-2716, Vol. 20, no 1, p. 107-125Article in journal (Refereed) Published
Abstract [en]

A hybrid workstyle is becoming more common post-COVID-19, and longer occupancy hours at home are increasing household electricity consumption. Small homes are regarded as a potential for improving energy efficiency in the residential sector, and a home consists of mixed-function spaces with dynamic occupancy behaviors. These underpin the opportunity to optimize presence sensing lighting in small homes for energy efficiency and user-behavioral needs. A comprehensive overview of presence sensing approaches, comparing four types of non-wearable sensors connected to home lighting is made. A bibliometric mapping of the reviewed literature visually reinforces a significant research gap that presence sensing studies were not connected to home lighting but inclined toward the commercial and institutional context. Next, a non-exhaustive example of commercially available presence sensing products applicable to residential lighting for small homes is analyzed, and their general characteristics and technologies are synthesized. The literature and product overview identified five significant product knowledge gaps. Incorporating the gathered information leads to the proposal of a conceptual flexible radar-based sensor (prototype design), addressing a wish list with three important criteria to optimize future presence sensing lighting in a mixed-function small home. Future radar sensing studies are expected to develop an anticipatory lighting system that processes real-time multi-user vital signals for smarter localized and personalized lighting options for (small) living environments.

Place, publisher, year, edition, pages
Taylor & Francis, 2024
Keywords
Sensors; presence sensing; lighting; residential environment; user- behavioral needs
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-60549 (URN)10.1080/15502724.2023.2198670 (DOI)000997841200001 ()2-s2.0-85161396768 (Scopus ID)HOA;;882836 (Local ID)HOA;;882836 (Archive number)HOA;;882836 (OAI)
Projects
Daylight and Occupancy Sensing Environments (DOSE)
Funder
Swedish Energy Agency, P50786-1
Available from: 2023-05-31 Created: 2023-05-31 Last updated: 2024-01-15Bibliographically approved
Aries, M., Tabbah, A. & Fischl, G. (2023). Field study challenges: Customisation and personalisation during lighting control research in residences. In: Journal of Physics: Conference Series, Volume 2600, Daylighting & electric lighting: . Paper presented at CISBAT International Conference, 13-15 September, 2023, Lausanne, Switzerland. Institute of Physics (IOP), 2600(11), Article ID 112009.
Open this publication in new window or tab >>Field study challenges: Customisation and personalisation during lighting control research in residences
2023 (English)In: Journal of Physics: Conference Series, Volume 2600, Daylighting & electric lighting, Institute of Physics (IOP), 2023, Vol. 2600, no 11, article id 112009Conference paper, Published paper (Refereed)
Abstract [en]

Residential lighting control can assist in creating a comfortable atmosphere, providing information, and supporting well-being. Field studies are used to investigate lighting control, but study protocol customisation or personalisation may be required due to actual life events and situations. An 8-week field study tested three protocols for effects on behaviour, well-being, and sleep patterns and was executed in 14 apartments during the winter. Light amount and timing were controlled: residents woke up with a dawn simulation, experienced lights turn-off as an indication to leave for work, and were prepared for bed during a dusk simulation scenario. Sleep trackers results showed later and more wide-ranged wake-up and bedtimes than assumed. As expected, the apartments’ different floorplans challenged comparable light exposure. Unexpectedly, several participants requested a reduced wake-up frequency and reported sleeping elsewhere on Fridays and Saturdays. Everybody experienced a full dawn simulation, but some people left home soon after wake-up, calling for lighting control customisation. Real-time field applications may demand a certain level of customisation or personalisation, affecting intentions and results. Discussing and documenting (un)intentional adjustments during final interviews and in scientific publications can benefit in explaining findings and further research.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2023
Series
Journal of Physics: Conference Series, ISSN 1742-6588, E-ISSN 1742-6596 ; 2600
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-63001 (URN)10.1088/1742-6596/2600/11/112009 (DOI)2-s2.0-85180151913 (Scopus ID)
Conference
CISBAT International Conference, 13-15 September, 2023, Lausanne, Switzerland
Funder
Swedish Energy Agency, P45185
Available from: 2023-12-06 Created: 2023-12-06 Last updated: 2024-01-12Bibliographically approved
Sithravel, R., Landré, J., Aries, M. & Hurtig-Wennlöf, A. (2023). Potentials of radar sensor detecting the presence of an imitated user for optimising short-range presence-sensing lighting in homes. In: Journal of Physics: Conference Series, Volume 2600, Daylighting & electric lighting: . Paper presented at CISBAT International Conference, 13-15 September, 2023, Lausanne, Switzerland. Institute of Physics (IOP), 2600(11), Article ID 132010.
Open this publication in new window or tab >>Potentials of radar sensor detecting the presence of an imitated user for optimising short-range presence-sensing lighting in homes
2023 (English)In: Journal of Physics: Conference Series, Volume 2600, Daylighting & electric lighting, Institute of Physics (IOP), 2023, Vol. 2600, no 11, article id 132010Conference paper, Published paper (Refereed)
Abstract [en]

Current presence-sensing technologies for energy-efficient lighting control and building optimisation are (i) catered to commercial and institutional environments, and (ii) focused on lamp technology and occupancy detection. They often ignore user behaviour characteristics, which significantly influence energy consumption. Therefore, this study aims to identify alternative sensing techniques as part of a lighting control system that can energy-efficiently support user's behavioural needs in mixed-function residential spaces. An exploratory study investigated the optimal placement of a non-wearable radar sensor to detect an imitated user's breathing frequency at varying pre-set horizontal distance positions, and the sensor's performance was validated with a spirometer. The procedure measured a balloon's radar-detected distance, radar-detected breathing frequency, and spirometer-registered breathing frequency at each pre-set position. The radar sensor detected all simulated breathing frequencies with almost 100% data accuracy but was not comparable in detecting all distances. The radar offers a less intrusive short-range presence-sensing for homes, accurately detecting breathing frequencies in a contactless way between 0.2m to 0.8m. Further investigations are recommended to develop radar sensing that could predict lighting options based on user's objective feedback.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2023
Series
Journal of Physics: Conference Series, ISSN 1742-6588, E-ISSN 1742-6596 ; 2600
National Category
Architectural Engineering Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hj:diva-63004 (URN)10.1088/1742-6596/2600/13/132010 (DOI)2-s2.0-85180153290 (Scopus ID)
Conference
CISBAT International Conference, 13-15 September, 2023, Lausanne, Switzerland
Funder
Swedish Energy Agency, P50786-1
Available from: 2023-12-06 Created: 2023-12-06 Last updated: 2024-01-12Bibliographically approved
Tabbah, A., Aries, M., Moscati, A. & Johansson, P. (2023). Simulation workflows in multi-objective lighting design optimisation for human well-being and building performance metrics: a scoping review. In: Journal of Physics: Conference Series, Volume 2600, Daylighting & electric lighting: . Paper presented at CISBAT International Conference, 13-15 September, 2023, Lausanne, Switzerland. Institute of Physics (IOP), 2600(11), Article ID 112013.
Open this publication in new window or tab >>Simulation workflows in multi-objective lighting design optimisation for human well-being and building performance metrics: a scoping review
2023 (English)In: Journal of Physics: Conference Series, Volume 2600, Daylighting & electric lighting, Institute of Physics (IOP), 2023, Vol. 2600, no 11, article id 112013Conference paper, Published paper (Refereed)
Abstract [en]

Lighting in the built environment has effects on different aspects, ranging from building performance in terms of costs and energy consumption to human well-being in terms of thermal comfort, visual effects, and beyond-vision effects. Buildings optimised for specific performance metrics rarely consider performance aspects simultaneously, leading to sub-optimised, unbalanced, or non-trade-off solutions. Therefore, multi-objective optimisation has been more commonly used to overcome conflicting performance objectives. Recently, metrics to quantify light effects beyond vision became available, but it is unclear if and how they are integrated with other existing building performance metrics. A scoping review investigated the state-of-art in multi-objective lighting design optimisation regarding building performance and human well-being focusing on performance metrics, simulation workflows, and the overall information flow. The search in Scopus and Web of Science databases resulted in 89 journal articles and conference papers, and the 21 papers reaching the highest optimisation level were discussed. The information extracted was categorised into optimisation metrics, levels, and design variables. The results show that none of the papers combines visual and beyond-vison effects with other building performance metrics.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2023
Series
Journal of Physics: Conference Series, ISSN 1742-6588, E-ISSN 1742-6596 ; 2600
National Category
Architectural Engineering Building Technologies
Identifiers
urn:nbn:se:hj:diva-63005 (URN)10.1088/1742-6596/2600/11/112013 (DOI)2-s2.0-85180151874 (Scopus ID)
Conference
CISBAT International Conference, 13-15 September, 2023, Lausanne, Switzerland
Funder
Swedish Energy Agency, P45185
Available from: 2023-12-06 Created: 2023-12-06 Last updated: 2024-01-12Bibliographically approved
Beute, F. & Aries, M. (2023). The importance of residential dusk and dawn light exposure for sleep quality, health, and well-being. Sleep Medicine Reviews, 72(December), Article ID 101865.
Open this publication in new window or tab >>The importance of residential dusk and dawn light exposure for sleep quality, health, and well-being
2023 (English)In: Sleep Medicine Reviews, ISSN 1087-0792, E-ISSN 1532-2955, Vol. 72, no December, article id 101865Article in journal (Refereed) Published
Abstract [en]

Light exposure during twilight plays a critical role in the entrainment of the human circadian system. People are most often at home during dusk and dawn, and light exposure at home – either natural or from electric light – may therefore contribute substantially to sleep and well-being. However, very little research has focused on the effects of home lighting on sleep and well-being, and even less research has investigated the effects of light exposure during twilight. Therefore, a literature study was performed to collect studies on light exposure at home during dusk and dawn. Studies looking at light exposure during dusk and dawn have focused on either electric light intervention (i.e., dusk and dawn simulation) at home or in the laboratory or daylight exposure in the bedroom (i.e., the presence and type of curtains in the bedroom). Most research has focused on dawn simulation during the darker months of the year, often using sunrise alarms. In general, study results pointed to the importance of twilight light exposure at home for sleep and well-being. These results may depend on the characteristics of the user, such as age or chronotype.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Daylight, Home environment, Dusk-dawn simulation, Twilight, Sleep, Well-being
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-62671 (URN)10.1016/j.smrv.2023.101865 (DOI)001101377700001 ()37864914 (PubMedID)2-s2.0-85174674515 (Scopus ID)HOA;intsam;909929 (Local ID)HOA;intsam;909929 (Archive number)HOA;intsam;909929 (OAI)
Funder
Swedish Energy Agency, P45185-1
Available from: 2023-10-16 Created: 2023-10-16 Last updated: 2024-01-19Bibliographically approved
Aries, M. (2022). Editorial: Personalised lighting design. Lighting Research and Technology, 54(6), 513-513
Open this publication in new window or tab >>Editorial: Personalised lighting design
2022 (English)In: Lighting Research and Technology, ISSN 1477-1535, E-ISSN 1477-0938, Vol. 54, no 6, p. 513-513Article in journal, Editorial material (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Sage Publications, 2022
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-58580 (URN)10.1177/14771535221122837 (DOI)000853619200001 ()
Available from: 2022-10-03 Created: 2022-10-03 Last updated: 2022-10-03Bibliographically approved
Tabbah, A., Fischl, G. & Aries, M. (2022). Evaluating Digital Twin light quantity data exchange between a virtual and physical environment. In: : . Paper presented at BUILDSIM NORDIC 2022, 22nd-23rd August, Copenhagen, Denmark.
Open this publication in new window or tab >>Evaluating Digital Twin light quantity data exchange between a virtual and physical environment
2022 (English)Conference paper, Published paper (Refereed)
Abstract [en]

In the built environment, both daylight performance and human behaviour are highly dynamic aspects. Therefore, they require a dynamic optimization approach to provide humans with the right amount of lighting at the right time of day. Building Information Management (BIM) and Digital Twin (DT) technology can optimize - with the help of Smart lighting systems - lighting used to support human health and well-being as well as the building’s energy performance. Where lighting simulation aims to represent a (static) reality DT technology can provide a dynamic two-way feedback between the physical and virtual environment to optimize the lighting environment using real-time and virtual sensor data. A fully detailed BIM model has the advantage of realism and as-built information but the disadvantage of heaviness and complexity that can slow down the data exchange. On the other hand, a simplified BIM model will be easier to manage and serve the simulation purpose but may oversimplify reality. However, light simulation validations have been done multiple times, but not many studies are performed using DT-driven light evaluation in which not only the realistic representation but also the exchange of information plays a crucial role. Therefore, this study investigated data exchange between a physical and real environment and focused on a scenario in which optimal interaction between daylight and electric light derives an optimized realization of a given light demand curve. Investigation and validation of a DT model was done using a virtual room simulated in the light simulation tool DIALux evo and its physical twin: an existing room equipped with light sensors. Data exchange was optimized for three levels of geometrical complexity (fine, medium, and coarse). The paper will present and discuss results regarding the influence of model complexity and consequences for the speed of information exchange as well as a first strategy for optimized daylight/electric light performance due to interaction between the DT components.

Series
E3S Web of Conferences, E-ISSN 2267-1242 ; 362
National Category
Building Technologies
Identifiers
urn:nbn:se:hj:diva-58603 (URN)2-s2.0-85146838645 (Scopus ID)
Conference
BUILDSIM NORDIC 2022, 22nd-23rd August, Copenhagen, Denmark
Funder
Swedish Energy Agency, P45185-1
Available from: 2022-10-10 Created: 2022-10-10 Last updated: 2023-02-08Bibliographically approved
Aries, M., Fischl, G., Lowden, A. & Beute, F. (2022). The relationship of light exposure to sleep outcomes among office workers. Part 1: Working in the office versus at home before and during the COVID-pandemic. Lighting Research and Technology
Open this publication in new window or tab >>The relationship of light exposure to sleep outcomes among office workers. Part 1: Working in the office versus at home before and during the COVID-pandemic
2022 (English)In: Lighting Research and Technology, ISSN 1477-1535, E-ISSN 1477-0938Article in journal (Refereed) Epub ahead of print
Abstract [en]

The relationship between everyday light exposure and sleep was studied for office workers. The study was conducted during the upswing of the COVID-19 pandemic, enabling a comparison between Office and Home Workdays. Fifteen full-time office employees were monitored for a period of 4–6 weeks. They wore a light-tracking device on their clothes and had a sleep tracker at home. Compared to an Office Workday, light exposure was lower in the afternoon and total sleep time was almost 5 minutes longer on a Home Workday. Sleep efficiency was the same on both workday types. A higher median illuminance level in the afternoon was significantly related to later sleep onset on an Office Workday. Higher median illuminance levels in the morning were related to earlier awakening. Counter to expectations, higher light levels in the evening were also related to earlier awakening. Everyday light exposure matters for sleep quality but may affect circadian functioning differently than the often more extreme light interventions employed in laboratory experiments. Moreover, differences in outcomes between Office and Home Workdays signal the need for further investigation to provide supportive light levels during workhours.

Place, publisher, year, edition, pages
Sage Publications, 2022
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-59145 (URN)10.1177/14771535221136096 (DOI)000897626500001 ()2-s2.0-85144187595 (Scopus ID)HOA;intsam;848418 (Local ID)HOA;intsam;848418 (Archive number)HOA;intsam;848418 (OAI)
Available from: 2022-12-15 Created: 2022-12-15 Last updated: 2022-12-30
Beute, F., Lowden, A. & Aries, M. (2022). The relationship of light exposure to sleep outcomes among office workers: Part 2: Comparison of days with and without social constraints. Lighting Research and Technology
Open this publication in new window or tab >>The relationship of light exposure to sleep outcomes among office workers: Part 2: Comparison of days with and without social constraints
2022 (English)In: Lighting Research and Technology, ISSN 1477-1535, E-ISSN 1477-0938Article in journal (Refereed) Epub ahead of print
Abstract [en]

Social constraints posed by work schedules influence sleep duration and timing. Everyday light exposure can help (or hinder) sleep outcomes. This study investigated the differences in the relationship between light exposure and sleep outcomes on days with and without social constraints using ambulatory assessment for 4?6?weeks for 15 office employees. The effects of light on sleep were investigated for both clock time and wake time (related to individual sleep times). Participants were exposed to more light during the morning and afternoon on workdays, and sleep times were later on days without social constraints. The relationship between light exposure and sleep was more pronounced, or sometimes even only present, for days without social constraints. In addition, no differences were found between clock time and wake time, which underlines the complexity of the relationship between everyday light exposure and sleep. Despite increased light exposure during workdays, the effects of light on sleep were more pronounced on days without social constraints. It may signal that office workers need a more substantial circadian stimulus (i.e. higher light exposure) for light to influence sleep outcomes on days with social constraints.

Place, publisher, year, edition, pages
Sage Publications, 2022
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-59146 (URN)10.1177/14771535221136099 (DOI)000893682700001 ()2-s2.0-85144238976 (Scopus ID)HOA;intsam;848419 (Local ID)HOA;intsam;848419 (Archive number)HOA;intsam;848419 (OAI)
Available from: 2022-12-15 Created: 2022-12-15 Last updated: 2022-12-30
Aries, M. (2021). Editorial: Human-centred integrative lighting and spill-over effects. Lighting Research and Technology, 53(8), 699-699
Open this publication in new window or tab >>Editorial: Human-centred integrative lighting and spill-over effects
2021 (English)In: Lighting Research and Technology, ISSN 1477-1535, E-ISSN 1477-0938, Vol. 53, no 8, p. 699-699Article in journal, Editorial material (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Sage Publications, 2021
National Category
Architectural Engineering
Identifiers
urn:nbn:se:hj:diva-55202 (URN)10.1177/14771535211058058 (DOI)
Available from: 2021-12-01 Created: 2021-12-01 Last updated: 2021-12-01Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7520-1593

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