Individual Lighting Control: Task Performance, Mood, and Illuminance

Boyce, P.R.; Eklund, Neil; Simpson, S. Noel

doi:10.1080/00994480.2000.10748488

Cited by 95 publications

(56 citation statements)

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“…Similar results have been found previously [104], [107], [121]. By allowing the users to dim the lighting according to their preferences, energy savings may be achieved, as some of the users may prefer lower illuminances.…”

Section: Discussion and Analysissupporting

confidence: 84%

“…By allowing the users to dim the lighting according to their preferences, energy savings may be achieved, as some of the users may prefer lower illuminances. This has also been found previously [121]. On the other hand, some users prefer higher illuminances and this might improve their work performance [122].…”

Section: Discussion and Analysissupporting

confidence: 83%

“…On the other hand, some users prefer higher illuminances and this might improve their work performance [122]. The previous studies have shown also that user controllable lighting may increase productivity in some cases [123], but in others the effect may be less visible [121].…”

Section: Discussion and Analysismentioning

confidence: 99%

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Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Viitanen

Halonen

2014

Journal of Renewable and Sustainable Energy

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Ene rgy e ffic ie nt l igh t ing syst e ms in buil dings w it h int e grat e d ph o t o vo l t aic s J a nne V i i t a ne n D O C T O R A L D I S S E R T A T I O N SAalto University publication series DOCTORAL DISSERTATIONS 18/2015 Energy efficient lighting systems in buildings with integrated photovoltaics Janne Viitanen A doctoral dissertation completed for the degree of Doctor of Science (Technology) to be defended, with the permission of the Aalto University School of Electrical Engineering, at a public examination held at the lecture hall S1 of the school on 6 March 2015 at 12. Aalto University School of Electrical Engineering Department of Electrical Engineering and Automation Lighting Unit AbstractThe goal of this thesis was to study how a building integrated photovoltaic system, choice of lighting technology and the selected system voltage affect the energy efficiency of an office building. The quality of the lighting was considered also, as it is essential that users accept the lighting.The energy production of photovoltaic system (PV) was evaluated in Southern Finland through onsite PV measurements from several different compass points and tilt angles during 2010-2013. Based on the measurements, the PV system was sized to provide energy for lighting and office appliances. The energy efficiency of the devices had considerable effect on the sizing of the PV system. The seasonal variations in the PV production were considerable, as only few per cent of the summer time insolation was available during the winter.The energy efficiency and quality of lighting was studied. Fluorescent lighting (FL) and LED lighting were compared, as they are the most used options in offices today. Lighting measurements and a user study was conducted. Different illuminance levels and correlated colour temperatures (CCT) were studied. The studied parameters included glare, reading task performance, identification of detail, colour naturalness and pleasantness, illuminance level sufficiency and pleasantness, pleasantness of the lighting in general and naturalness of the shadows. The subjects also set their own preferred illuminance levels and CCTs. No major differences were found in the subjective preferences at equal illuminance levels between luminaire types. On average, an illuminance level around 600 lx and a CCT around 4000 K were preferred. LEDs were found more energy efficient than FLs and the difference increased when the luminaires were dimmed.In the last part of the research the electricity consumption of an office building was compared with system voltages 12 VDC, 24 VDC, 48 VDC and 230 VAC through computer simulations in a Matlab-Simulink environment. It was found that 230 VAC was the most energy efficient option as a general system voltage, with the selected components and system variables. The 24 VDC was the most energy efficient option with fluorescent lighting and the 48 VDC with LED lighting, if only the lighting system was considered. Aurinkosähkön tuotantoa Etelä-Suomessa tutkittiin mittausten avulla eri il...

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Section: Discussion and Analysissupporting

confidence: 84%

Section: Discussion and Analysissupporting

confidence: 83%

See 1 more Smart Citation

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Viitanen

Halonen

2014

Journal of Renewable and Sustainable Energy

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“…On average, people with dimming control chose ambient light levels that were approximately 25% lower than current practice. Another study that tested dimmable ceiling lighting found that subjects who had controllable lighting were more satisfied with the lighting, felt more comfortable in the room, rated the tasks as less difficult and rated the lighting quality as higher than the subjects who did not have control (Boyce, et al 2000). In that study the control system produced a 35% to 42% decrease in electrical consumption.…”

Section: Intelligent Lightingmentioning

confidence: 93%

Lighting Business Case -- A Report Analyzing Lighting Technology Opportunities with High Return on Investment Energy Savings for the Federal Sector

Jones¹,

Richman²

2005

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Executive SummaryLighting in buildings remains a huge energy savings opportunity that is highly competitive with other Federal energy savings opportunities in terms of return on investment. The US Department of Energy's Federal Energy Management Program (DOE FEMP) is challenged with executive and legislative goals that are increasingly difficult to meet as energy efficiency becomes more challenging in the Federal market. Given these challenges FEMP must be selective when making programmatic investments; there must be a high probability of success and a clear path toward meeting energy savings goals. It is with these things in mind that the Lighting Business Case has been developed.Lighting technology is evolving at a rapid pace and yet standard practice with respect to lighting in Federal facilities has not similarly evolved. Federal facilities are generally slow to embrace new and emerging technologies due to a series of complex factors. The best lighting efficiency opportunities are underutilized in both retrofits and new construction largely because energy efficiency contractors are not sufficiently motivated or able to try new and unfamiliar strategies. This is not from lack of interest; their best intentions are thwarted by market barriers and obstacles such as lack of awareness, expertise, excessive risk, high costs, and procurement challenges. Intervention is necessary to realize energy savings and meet the legislated goals.This report presents analysis and data that has been used to determine high value energy savings opportunities, and provides a series of candidate (suggested) tasks to implement the opportunities indicated by analysis. Candidate tasks are shown to address market barriers and have performance metrics provided for measurement of progress against the goals. Analysis included detailed information about four specific high-value lighting technologies and their usages, projected market penetration into the Federal building stock, and the potential energy savings shown against FEMP goals.The results of the analysis show that the effect of strategic Federal efforts towards deployment of new and emerging lighting technologies is to almost double the natural penetration rate by the year 2014. The cumulative savings of the four lighting technologies is 14,000 Btu's per gross square foot as of 2014. This represents 72 percent of the overall goal of 2 percent per year across all Federal agencies, as directed by the Energy Policy Act of 2005. Return on investment information is presented for each of the four technologies.The Lighting Business Case provides solid support for programmatic investment decisions and the basis for a multiyear lighting master plan. Execution of selected tasks will bring FEMP significantly closer to meeting legislative energy savings goals. Recommendations include maintaining an ongoing cognizant FEMP program manager to oversee a core capability in lighting, planning and implementation activities. It will be important to leverage internal and external partnerships to achieve...

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“…It has been found that appropriate illuminance differs by an individual's preference and the nature of work [6]. Japanese Industrial Standards (JIS) recommend working in different illuminance environments depending on the purpose of using a given space [7].…”

Section: Illuminancementioning

confidence: 99%

Examination of Color-Lighting Control System Using Colored Paper User Interface

Aida

Matsui

Keisuke

et al. 2016

MATEC Web of Conferences

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Abstract. In recent year, Full-Color LED Lighting that can be changed to various color such as red, green, blue has been appeared with development of LED Lighting. By Color-Lighting control, users affected such as concentrating and relaxing. Therefore, Color-lighting control will spread to various place such as home, offices, stations. However color-lighting control affected some disturbance such as daylight, display when Full-Color LED controlled indoors. Also, information devices control get difficult with information technology develop. I propose Color-Lighting Control System using Colored Paper User Interface(CLC/CPUI). The purpose of CLC/CPUI is that anyone can intuitively control Full-Color LED Lighting. CLC/CPUI uses colored paper as user interface by sensing the paper. CLC/CPUI realizes lighting color that user demanded to do feedback control. I conduct accuracy verification experiment of CLC/CPUI.

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Individual Lighting Control: Task Performance, Mood, and Illuminance

Cited by 95 publications

References 0 publications

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Electrical efficiency study of alternating current and direct current power topologies in office building with integrated photovoltaics in Matlab-Simulink environment

Lighting Business Case -- A Report Analyzing Lighting Technology Opportunities with High Return on Investment Energy Savings for the Federal Sector

Examination of Color-Lighting Control System Using Colored Paper User Interface

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