Event Detail

International Lighting Seminar: Metrology, Lifetime, Health and Smart Sustainable Lighting

Tuesday, 14th May 2024
Chancellor’s Hall, Senate House,
University College London, Malet Street, London, WC1E 7HU

LED lighting continues to expand its market share, taking over conventional technologies in all end-use applications, yet challenges and opportunities relating to lighting remain. This International Lighting Seminar brought together Experts from the IEA 4E SSLC Platform to present their latest work on a range of topics including a new Interlaboratory Comparison on Temporal Light Modulation (commonly known as flicker); research into new test methods and metrics; a literature review of health effects associated with lighting; the opportunity and impact on energy consumption of smart lighting; and a recent life-cycle assessment comparing linear fluorescent lamps and LED tubes. 

The meeting agenda is available here for download as a PDF.


Moderators:     Prof Georges Zissis, Chair, IEA 4E SSLC Platform, La Place University Toulouse

                            Nils Borg, Manager, IEA 4E SSLC Platform, Stockholm, Sweden


14h00  Welcome and IEA 4E SSLC Platform Overview

Nils Borg, Manager, IEA 4E SSLC Platform, Sweden

  • Welcome and introduction to the SSLC Platform
  • A link between policy standards, testing and requirements
  • Overview of work and activities
  • Energy Savings Potential of Lighting Systems and Controls

Video link: https://www.youtube.com/watch?v=sxjgsIx5xZw


14h15  Interlaboratory Comparison 2023 on Measurement of Temporal Light Modulation

Dr Yoshi Ohno, NIST Fellow, National Institute of Standards and Technology, USA

  • Purpose of IC 2023
  • Findings of Nucleus Lab Comparison
  • Progress on Participant Testing and Reporting
  • Issues Identified and Data Being Prepared for Standardisation Community

Video link:  https://www.youtube.com/watch?v=44WccHgzpoE 
Slides link:  SSLC Platform International Seminar – Yoshi Ohno


14h45  Improvements in Test Methods and Metrics

Carsten Dam-Hansen, DTU, Denmark;
Steve Coyne, Light Naturally, Australia

  • Test of Temporal Light Modulation (TLM)
  • Influence of power supply selection on flicker metric PstLM
  • Stroboscopic effect SVM calculation: current approach and potential improvements
  • Standard test options for determining lifetime
  • Impact of long-duration switching
  • Research involving accelerated aging and pulse/soak testing at elevated temperatures and comparison to standard test method

Video link:  https://www.youtube.com/watch?v=F_4eZJS0nds
Slides link:  SSLC Platform International Seminar – Carsten Dam Hansen and Steve Coyne


15h40  Coffee / tea / soft drink break with light snacks


16h00  Solid-State Lighting: Review of Health Effects

Christophe Martinsons, CSTB, France

  • Overview of new Lighting and Health report
  • Photobiological safety, glare, circadian effects, acute neuro-behavioural effects, temporal light modulation and long-term effects
  • Conclusions and recommendations

Video link: https://www.youtube.com/watch?v=XMOxkceZX0U
Slides link:  SSLC Platform International Seminar – Christophe Martinsons


16h30  Advanced Smart Lighting must also be Energy Smart

Casper Kofod, Director, Energy Piano, Denmark

  • Smart Lighting trends, barriers and potential
  • SSL Annex Second Report on Smart Lighting – findings
  • Performance when dimming and/or changing colour temperature
  • Regulation and Standards from IEC/CIE – need for characterisation
  • Recommendations for the future including integrating with controls

Video link:  https://www.youtube.com/watch?v=gqGTyN2iNgI
Slides link: SSLC Platform International Seminar – Casper Kofod


17h00  LED Linear Lamp Life-Cycle Assessment

Michael Scholand, Deputy Manager, SSLC Platform, UK

  • Life-Cycle Assessment overview
  • Key findings and comparison with baseline fluorescent lamps
  • Conclusions and recommendations

Video link:  https://www.youtube.com/watch?v=Sshj87ie2Z4
Slides link:  SSLC Platform International Seminar – Michael Scholand


17h25  Thanks and closing remarks

Nils Borg, Manager, IEA 4E SSLC Platform, Stockholm, Sweden



May 14 2024


2:00 pm - 5:30 pm

Local Time

  • Timezone: America/New_York
  • Date: May 14 2024
  • Time: 9:00 am - 12:30 pm
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