Energy saving potential and strategies for electric lighting in future North European, low energy office buildings: A literature review

Research output: Contribution to journalReview article


This article presents key energy use figures and explores the energy saving potential for electric lighting in office buildings based on a review of relevant literature, with special emphasis on a North European context. The review reveals that theoretical calculations, measurements in full-scale rooms and simulations with validated lighting programs indicate that an energy intensity of around 10 kWh/m(2) yr is a realistic target for office electric lighting in future low energy office buildings. This target would yield a significant reduction in energy intensity of at least 50% compared to the actual average electricity use for lighting (21 kWh/m(2) yr in Sweden). Strategies for reducing energy use for electric lighting are presented and discussed, which include: improvements in lamp, ballast and luminaire technology, use of task/ambient lighting, improvement in maintenance and utilization factor, reduction of maintained illuminance levels and total switch-on time, use of manual dimming and switch-off occupancy sensors. Strategies based on daylight harvesting are also presented and the relevant design aspects such as effects of window characteristics, properties of shading devices, reflectance of inner surfaces, ceiling and partition height are discussed. (C) 2011 Elsevier B.V. All rights reserved.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Building Technologies


  • Office, Lighting, Daylight harvesting, Occupancy controls, Manual or, automatic dimming, Potential electricity savings, Illuminance, Windows, Shading devices, Reflectance
Original languageEnglish
Pages (from-to)2572-2582
JournalEnergy and Buildings
Issue number10
Publication statusPublished - 2011
Publication categoryResearch