Assessment of filament led bulbs with respect to temporal light artefacts

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


    Temporal light artefacts, abbreviated TLAs (including flicker, stroboscopic effect and phantom arrays), i.e. undesired time modulation in luminance from a light source, has shown to be a threat to wider SSL adoption especially related to dimming functions and low-quality LED products. This is due to the effects that both noticeable and unperceivable TLAs have on human perception and wellbeing. In the present work a number of filament LED bulbs, currently available on the market, are assessed primarily with respect to TLAs, but also with respect to photometric, colorimetric and efficiency properties. The investigation shows that only one of the 10 investigated lamps can be considered flicker free. The rest of the lamps the TLAs are of such a magnitude that none of them fulfil the suggested recommendations currently available.
    Original languageEnglish
    Title of host publicationProceedings of the Conference on "Smarter Lighting for Better Life" at the CIE Midterm Meeting 2017
    PublisherCIE - International Commission on Illumination
    Publication date2017
    ISBN (Print)978-3-901906-95-4
    Publication statusPublished - 2017
    EventCIE Midterm Meeting 2017 - Ramada Plaza Jeju Hotel, Jeju, Korea, Republic of
    Duration: 23 Oct 201725 Oct 2017


    ConferenceCIE Midterm Meeting 2017
    LocationRamada Plaza Jeju Hotel
    Country/TerritoryKorea, Republic of


    • Temporal Light Artefacts
    • TLA
    • Flicker
    • Filament LEDs
    • Dimming
    • Photometry
    • Colorimetry
    • Colour Rendering


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