Luminous flux and colour maintenance investigation of integrated LED lamps

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


This article will present an investigation of the luminous flux and colour maintenance of white LED based retrofit lamps. The study includes 23 different types of integrated LED lamps, covering 18 directional and 5 non-directional. Luminous flux and colour data for operation up to 20000 h has been measured, and will be presented. Data for the first 6000 h of operation is used for studying extrapolation method and results are compared with experimental data for operation over 19000 h. It has been further examined when catastrophic failures occurred
Original languageEnglish
Title of host publicationProceedings of CIE 2014 : Lighting quality and energy efficiency
PublisherCIE - International Commission on Illumination
Publication date2014
ISBN (Print)978-3-902842-49-7
Publication statusPublished - 2014
EventCIE 2014: Lighting Quality & Energy Effciency - Hotel Istana, Kuala Lumpur, Malaysia
Duration: 23 Apr 201426 Apr 2014


ConferenceCIE 2014
LocationHotel Istana
CityKuala Lumpur


  • LED
  • LEDi
  • Lumen maintenance
  • Colour maintenance
  • Lifetime


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  • CIE 2014

    Anders Thorseth (Participant)

    23 Apr 201426 Apr 2014

    Activity: Attending an eventParticipating in or organising workshops, courses, seminars etc.

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