The SSLC Platform presented a webinar today on the findings from its international interlaboratory comparison (IC 2023) on the measurement of Temporal Light Modulation (TLM). IC 2023 was designed to evaluate how well laboratories around the world measure temporal light modulation quantities, covering flicker and stroboscopic effects from LED lighting products. In addition, IC 2023 also served as a proficiency test for laboratories seeking accreditation. IC 2023 builds on the earlier SSL Annex Interlaboratory Comparisons (IC 2013 and IC 2017) and is the first to focus on the TLM quantities; short-term flicker indicator (PstLM) and stroboscopic effect visibility measure (SVM), as well as modulation depth, flicker index and perceptual modulation.
Key technical findings from IC 2023 include: (1) Overall proficiency performance of participating laboratories; (2) Issues with laboratory uncertainty estimations; (3) Large influence on PstLM measurements from AC power supplies; (4) Issues with SVM measurements and TLM instruments; (5) Large variability and conceptual issues with Mp. Dr. Yoshi Ohno and Steve Coyne led this work and co-presented the results of the analysis on today’s webinar. The same webinar was held twice, once for the Asian/Australian time zones and once for the European / American time zones. Links to both webinars can be found below, along with a link to a PDF copy of the slides:
The slides presented at the meeting: Webinar on IC 2023 Final Report – Final Slides
A video of the Australian/Asian time zone webinar: https://youtu.be/9_FGPO5RAFU
A video of the European/Americas time zone webinar: https://youtu.be/g3bH5OJsJM8
Interlaboratory Comparisons are important because they support the lighting metrology community and improve the comparability and accuracy of LED product testing. Over the last decade, the SSLC Platform has conducted three international interlaboratory comparisons to improve measurement accuracy. IC 2023 was intended to help governments and manufacturers ensure that new LED products sold to consumers and companies are of high quality, with accurate measurements of the TLM metrics.
To learn about IC 2023 and view the publications associated with this project, please click on the following link: https://www.iea-4e.org/ssl/our-work/testing-standards/interlaboratory-comparison-2023/
