Canadian National Committee of the CIE

Welcome to our website. The CNC/CIE is the collective Canadian voice of people interested in the science and art of light and lighting. Membership is open to anyone interested in any aspect of lighting including vision, photometry, colorimetry, photobiology and the application of these to the use of light and lighting both indoors and out. For further information on  the CNC/CIE go to About the CNC. For a list of our recent events see our Activities page.

As part of its mandate, the CNC/CIE supports the Standards Council of Canada by providing the core of the membership of the Canadian mirror committee to ISO/TC 274 – Light and Lighting. ISO/TC 274 is responsible for standardization in the field of application of lighting in specific cases complementary to the work items of the CIE and the coordination of drafts standards from the CIE. For further information on ISO/TC 274 see About ISO/TC 274 or visit the ISO website.


12th Biennial Joint Meeting of the CNC/CIE and CIE-USNC and CORM 2019 Annual Technical Conference

The next meeting of the CNC/CIE will be a joint meeting with the Council for Optical Radiation Measurements (CORM) and CIE-USNC. It will be held in Ottawa the week of October 28th and will include a three day technical session and laboratory tours as well as the business meetings for the three organizations. A preliminary programme is now available. Everyone is encourage to participate in what promises to be an interesting and informative conference.

Registration for the meeting is now open. The deadline for early registration is 4 September 2019. Due to security requirements at NRC, the final registration date is 2 October 2019. To help you plan your visit to Ottawa please consult our Ottawa information sheet and list of downtown hotels.

Canadian Members on 2019-2023 CIE Board of Administration

The CNC/CIE is pleased to announce that Dr. Jennifer Veitch will serve as Vice-President Technical and Dr. Lorne Whitehead will serve as a Vice-President without portfolio on the 2019-2023 CIE Board of Administration. A complete list of the Officers of the 2019-2023 Board can be found on the CIE website. 

CIE News

CIE Events

5th CIE Expert Symposium on Colour and Visual Appearance, Hong Kong, 20-24 April, 2020. This is a joint symposium of CIE Division 1, Division 2 and Division 8 on all aspects of the perception and measurement of visual appearance and measurement of the bidirectional reflection and transmission distribution functions of modern materials. Abstract submissions open July 23, 2019 and close October 23, 2019.

CIE Position Statement on the Blue Light Hazard

The CIE has issued a position statement that puts into context the use of the term “blue light hazard” in line with the CIE’s current position on this term. It provides reassurance that people are normally not at risk of exceeding the internationally agreed blue light hazard exposure limits from white light sources used for illumination. However, it does warn about the inappropriate use of blue LEDs in products, such as toys, which are primarily used by young children.

Changes to the International System of Units (SI)

As of May 20, 2019, the International System of Units (SI) has changed from a system based on seven base units to a system based on seven constants. In particular, the luminous efficacy of monochromatic radiation of frequency 540 THz, Kcd, is set to 683 lm/W, relating the photometric units (lm, cd, lx) directly to their radiometric equivalences (W, W/sr, W/m2). The unit of power (W) can be expressed in terms of the Planck constant h and hyperfine transition frequency of Cesium (Delta_nue_Cs).

As well, the 9th SI-brochure has been published on the website of BIPM.  CIE has been involved in the revision, in particular in Appendix 3 "Units for photochemical and photobiological quantities". The revised version of the appendix introduces the spectral photon system in addition to the well established spectral radiometric system.

CIE Call for Experts

The following Technical Committees (TCs) were approved in 2018. Further details on these and all other active TCs can be found under Technical Committees. If you are interested in participating in one of these TC’s please contact the This email address is being protected from spambots. You need JavaScript enabled to view it. and they will put you in contact with the Chair. All Canadian members of TC’s must be or become members of the CNC/CIE.

TC 2-90 LED Reference Spectrum for Photometer Calibration
TC 2-91 Optical Measurement Methods of LED Packages and LED Arrays
TC 2-92 International Standard Format for the Electronic Transfer of Luminaire Optical Data
TC 4-58 Obtrusive Light from Colourful and Dynamic Lighting and its Limitation
TC 4-59 Guide for Lighting Urban Elements
JTC 14 (CIE-ISO) Integrative Lighting
JTC 15 (CIE-ISO) Lighting of Indoor Workplaces
JTC 16 (D1/D8) Validity of Chromatic Adaptation
JTC 17(D1/D2/D8) Gloss Measurement and Gloss Perception: A Framework for the Definition and Standardization of Visual Cues to Gloss

Request for Information

The following request for information has been issued by the CIE Central Bureau. Canadian Information on this topic would be welcome.

CIE JTC 12: The CIE Joint Technical Committee JTC 12 (D1/D2/D8) “The measurement of sparkle and graininess” is discussing the definition of measurement scales of sparkle and graininess. For this purpose, it is collecting visual data, which can be used for scaling or for devising texture difference formulae. Please, if you have obtained or you are planning to obtain visual data of sparkle and graininess and are willing to share them, or if you want to collaborate in the development of the measurement scales of sparkle and graininess, contact the JTC 12 Chair, This email address is being protected from spambots. You need JavaScript enabled to view it.

CIE Publications

Summaries of new CIE publications, including joint ISO/CIE documents, can now be found under New Publications.

Members of the CNC/CIE are reminded that they are able to get a discount on all CIE publications. The latest discount code, effective June 2019, is currently avaiable under CNC/CIE Members. If you do not have access, please contact the This email address is being protected from spambots. You need JavaScript enabled to view it. for your login and password.

For general enquiries contact: This email address is being protected from spambots. You need JavaScript enabled to view it.