Online tutorial on the understanding and application of CIE S 026:2018

This CIE Tutorial has been developed to support the understanding, adoption and proper application of CIE S 026/E:2018 CIE System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light.



More information

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May 25th 2021

09:00 - 10:00 CEST


5th Participant & Partner Meeting


We organized the 5th participant and partner meeting. With lectures of:


Dr. Luc Schlangen – Eindhoven, University of Technology
Advances in Lighting Metrology and Non-Visual Effects of Light.


Mrs. Cristina Tanase – Signify – Nature Connect
Bringing the natural light indoors with NatureConnect by Signify.​

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May 19th - 21st 2021


SLTBR's 32     annual meeting  

On behalf of the board of directors of the Society for Light Treatment and Biological Rhythms (SLTBR), they invited you to the society's first online congress.  With the generous support of their sponsors and industrial partners, this congress will be free of charge for all registered participants.

The topics that were discussed are : Photoreception, Lighting and Health. 

More information about the program and registration


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May 14th 2021

09:30 - 10:30 CEST


The unused potential of good light indoors

LED Expo Thailand and SMARTECH ASEAN 2021 organized a free webinar on zoom.

The main topics were:

- The problems of billions of people in biological darkness

- What is Good Light?

- The unused potential and business opportunity of good light

- Discovery 2002: Spheres (ipRGGs) synchronize biological clock 

- The advantages of Good Light & 'healthy buildings'

Watch the webinar here


March 23rd 2021

09:50 - 10:50 CET


LICHT 2021

From 21 to 24 march 2021, the European Light Congress in Germany took place as a complete online event. See Startseite | LICHT2021. The Good Light Group participated in the panel discussion about sustainable good light on Tuesday March 23, from 09:30 – 10:50.


See Nachhaltiges gutes Licht | LICHT2021

Light Symposium Wismar 2020/21

The digital lighting conference in Wismar took place online this year. The topic is very much related to the mission of the Good Light Group: “The future of daylight and artificial lighting in healthy built environments”.

Click here for the programme

March 10th - 12th 2021


SLL Webinar: Good indoor light makes people healthy and happy

The webinar began with a presentation from Jan, followed by a panel discussion with SLL President Elect, Dr Ruth Kelly Waskett and Professor Peter Raynham. There was also an opportunity for audience Q&A.

Click here for more information

March 10th 2021

12:00 CET


Online Lighting Fair Japan - Tokyo

There were several on-line lectures about Human Centric Lighting during this event. Christian Cajochen and Dorothy Sitt presented scientific backgrounds of how good light affects our body clock. Jan Denneman presented a lecture titled “the unused potential of good light indoors”.

Click here for all lectures

March 9th 2021

02:30 CET



February 17th 2021

17:00 CET


Non-visual effects of light and its application in architecture

PhD Steven W. Lockley, an associate professor of medicine, Harvard medical school neuroscientist, Brigham & Women’s hospital professor and VC fellow was presenting a webinar about non-visual effects of light and its applications in architecture, organized by the SLTBR.

Watch the full webinar here: Non-visual effects of light and its application in architecture

Second annual Participant Council meeting

On 28 January our board members and participants met online for the second Participant Council meeting. Representatives of 15 companies / universities were present.

More information: Second annual Participant Council meeting

January 28th 2021

9:00 CET


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Good Light indoors makes people healthy and happy

Presented by Mr. Jan Denneman, Chairman of the non-profit organization Good Light Group and Honorary Ambassador of the Global Lighting Association.

You can watch the full webinar here:

Good Light indoors makes people healthy and happy

January 21th 2021

15:00 CET



Chronotherapeutic treatments

Webinar organized by the SLTBR, by John Gottlieb, MD assistant professor at Northwestern University, Chicago USA.

You can watch the full webinar here:

John Gottlieb Chronotherapeutic Treatments

January 20th 2021

19:00 - 20:00 CET