Critical Analysis of Cost Benefits of LED Retrofits in Indoor Lighting

Raditschova, Jana; Gasparovsky, Dionyz

doi:10.1109/lumenv.2018.8521005

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…The latest Energy Technology List [ETL] issued by the Department for Business and Industrial Strategy (DBIS) ( 2020) is designed to keep organisations up to speed with the latest lighting technology. This document contradicts the arguments posed by Raditschova and Gasparovsky (2018), Bento and Marques Cardoso (2020) and Kaip (2017). The Department for Business and Industrial Strategy (DBIS) (2020) clearly defines LEDs as the "highest efficacy and lamp life of all that are cost-effective to run and are easy to control and maintain".…”

Section: Jedt 216mentioning

confidence: 56%

“…According to Pye (2020), monetary savings for the organisation can be as much as 45% when considering LED lighting. This was challenged by Raditschova and Gasparovsky (2018) by critically evaluating LED lighting technology with clear cost benefits of the LED retrofit. They came to the conclusion that stakeholders should be cautious about the LED's long-term lifecycle.…”

Section: Cost Benefit Of Ledmentioning

confidence: 99%

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Challenges and benefits of LED retrofit projects: a case of SALIX financed secondary school in the UK

Dunn

Oyegoke

Ajayi

et al. 2021

JEDT

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Purpose The recent surge in light emitting diode (LED) lighting retrofitted into schools in the UK is as a result of the UK Government’s 2050 zero carbon pledge. However, the benefits and consequences of LED retrofit projects for staff and enablers and stakeholder knowledge gaps about LED lighting retrofitting have not been fully explored. The aim of this research is to determine the amount of savings in cost, carbon reduction and kilowatt usage and to confirm if repayment from energy and cost savings derived from LED retrofit school projects funded through the SALIX funding option in the UK would be enough to service the loan. Thus, it examines monetary and non-monetary benefits, internal project stakeholder knowledge gaps and the consequences of LED retrofit for the staff and enablers of a large community college in the UK which is funded through the SALIX funding option. Design/methodology/approach The methodology relied on a hybrid research approach of a case secondary school through the review of literature, analysis of secondary data, focus group and questionnaire survey. The focus group consists of six key project stakeholders. The secondary data was sourced from the Project IGP [Individual Grade Proposal] and the Positive Energy Report from Zenergi, and the closed online questionnaire survey was used to sample 150 teaching staff and school enablers. Findings The findings show that stakeholders lack project knowledge, trust and expertise/project comprehension. This is in terms of baseline information, LED technology/management, payback modalities, management of risks and ethical issues around environmental impact. The forecasted SALIX savings were not achieved in real-time, partly because it does not take into consideration the increase in energy costs over the payback period. However, the LED retrofit creates efficiencies; drives down energy costs and energy usage; and drives carbon reduction, helping pupils’ learning, improving productivity and performance, and finally leading to a better lighting environment for the school community. Originality/value The study will help schools in the UK that intend to access SALIX finance for LED retrofits to understand the challenges and mitigate the risks. It will also help the government to understand the importance of adjusting the payback modalities to the base price when the retrofit was carried out for real-time savings to be made. The research would be useful in ensuring the proactive involvement of all the identified stakeholders in understanding the challenges and what the function entails.

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Section: Jedt 216mentioning

confidence: 56%

Section: Cost Benefit Of Ledmentioning

confidence: 99%

Challenges and benefits of LED retrofit projects: a case of SALIX financed secondary school in the UK

Dunn

Oyegoke

Ajayi

et al. 2021

JEDT

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“…9,10 However, LED lighting is more expensive than fluorescent lighting and may be beyond the budget of some schools especially in developing countries. 11 Mimicking the effects of LED lighting by using light filters over fluorescent classroom lighting may be a low-cost alternative to more costly light products. 12 A light filter is a sheet of thin, translucent, heat-resistant acrylic or fabric that covers the fluorescent lighting fixture frame, where it can block glare and produce full-spectrum light.…”

Section: Discussionmentioning

confidence: 99%

Emotional responses of college students to filtered fluorescent lighting in a classroom (v3)

Yuen¹,

Wood²,

Krentel³

et al. 2023

Health Psychology Research

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Background Classroom lighting, usually bright fluorescent light, can significantly influence the learning environment and emotions of students. Objective To assess the emotional impact of classroom lighting on students during an academic year. Methods This study used an ABAB withdrawal research design in the following manner: in phase A, the baseline condition, classroom lighting was provided by conventional overhead white fluorescent classroom lights; in phase B, the intervention condition, the conventional overhead white fluorescent classroom lights were covered with fabric filters (thin, translucent, creamy-colored plastic sheets) that were attached to the lighting fixture frame with magnetic discs. The filters produced softer light in the classroom than the fluorescent lights. Each phase lasted for at least 2 weeks. During each phase, students rated 18 pairs of words from the Mehrabian and Russell pleasure, arousal, and dominance semantic differential scale at least four times to assess the emotional impact of the lighting conditions. Results For all three emotional behaviors, the mean score of the filtered fluorescent light phase was significantly greater than the mean score of the baseline unfiltered fluorescent lighting phase, indicating more positive emotional responses. Students also noted they experienced fewer headaches and found it easier to see the whiteboard at the front of the classroom when the light filters were in place. Conclusion The light filters exerted a positive impact on the students’ emotions. Students preferred the filtered lighting to fluorescent lighting. This study supports the installation of filters over fluorescent lights in a college classroom.

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“…A study by [37] performed a life-cycle analysis of LED retrofits replacing traditional artificial lighting in facilities. According to the study, the lifetime of all LED retrofits is longer than the lifetimes of traditional lamps they are replacing.…”

Section: Metal Halide 70mentioning

confidence: 99%

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Higgins,

Ramnarayan,

Family

et al. 2024

Preprint

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A comprehensive Energy Audit of a Maintenance facility was performed to assess its energy performance and identify scope for improvement. The facility’s Energy Use Intensity (EUI) for 2022 was 404 kWh/m2 — more than double the Benchmark EUI for Maintenance facilities (151 kWh/m2) recommended by EnergyStar. Furthermore, the Load Factor for 2022 was 0.22, which is lower than the recommended minimum of 0.75 for an efficient building. The audit encompassed an in-depth evaluation of the building's structural and operational characteristics, comprising HVAC systems, lighting, building envelope, and energy-intensive machinery. An energy model of the building was developed to emulate the baseline building energy performance for 2022. Following the energy model's development and validation, an analysis was conducted to identify energy-intensive areas and opportunities for optimization. Energy Efficiency Measures were then formulated, focusing on improving energy efficiency while focusing on energy consumption reduction and GHG emission reduction. Results demonstrated the potential of Energy Audits and Modeling to enable significant reductions in energy consumption and promote sustainable building practices. Among the Energy Efficiency Measures considered, re-sizing and decarbonizing HVAC equipment contributed the most to energy savings, with a 100% decrease in natural gas and 37% decrease in electricity use annually.

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Critical Analysis of Cost Benefits of LED Retrofits in Indoor Lighting

Cited by 7 publications

References 7 publications

Challenges and benefits of LED retrofit projects: a case of SALIX financed secondary school in the UK

Challenges and benefits of LED retrofit projects: a case of SALIX financed secondary school in the UK

Emotional responses of college students to filtered fluorescent lighting in a classroom (v3)

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

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