On 8 July 2026, the SSLC Platform will hold a webinar to present the findings from its international interlaboratory comparison (IC 2023) on the measurement of Temporal Light Modulation (TLM). IC 2023 was designed to evaluate how consistently laboratories around the world measure TLM quantities, covering flicker and stroboscopic effects from LED lighting products. In addition, IC 2023 also served as a proficiency test for laboratories seeking accreditation. Dr. Yoshi Ohno and Steve Coyne led this work and will co-present the results of the analysis.

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

Please register to join us below to learn about these findings and more. The webinar is being held in cooperation with IEEE Smart Cities and IEEE Smart Lighting and will be delivered twice, once for the Australian/Asian time zones and once for the European/American time zones.

8 July – Australian/Asian Time Zones:
11h00 Brisbane / 10h00 Seoul / 09h00 Beijing
https://us02web.zoom.us/webinar/register/WN_aGbFmjTgQCWJJxeAUVo_KQ#/registration

8 July -European/American Time Zones:
15h00 Brussels / 14h00 London / 09h00 Washington DC
https://us02web.zoom.us/webinar/register/WN_0XjUa64TQZajbhD4PmQTHA#/registration