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.

CNC/CIE News

2019 Annual Meeting

The annual meeting of the CNC/CIE was held in Ottawa on 31 October 2019 as part of the joint meeting of the CNC/CIE, the Council for Optical Radiation Measurements (CORM) and the CIE-USNC. The Division reports presented at the joint CNC/CIE and CIE-USNC business meeting are available here.

Joint CNC/CIE, CIE-USNC and CORM Technical Conference

The presentations from the Technical Conference, held 28-30 October, 2019, will be available on both the CNC/CIE and CORM websties shortly.

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.

Mirror Committee to ISO/TC 274 News

Annual Meeting

The annual meeting of the Canadian Mirror Committee of ISO/TC 274 was held in Ottawa on 31 October 2019 as part of the CNC/CIE Annual Meeting.

Local Light and Lighting Events

Webinar on the Blue Light Hazard

The Optical Society of America (OSA) Color Technical Group is presenting a webinar: The Blue Light Hazard - What Does it Really Mean?, on 12 December 2019 at 12:00 PM, EST

As stated below, the International Commission on Illumination (CIE) recently published a Position Statement on Blue Light Hazard (BLH), addressing recent concerns about the possible hazardous effects of light on the retina. In this webinar, John O'Hagan will outline what the term means and the specific methods to assess the Blue Light Hazard from various sources of optical radiation, including LEDs. In addition, public health implications of the Blue Light Hazard will also be discussed. For further details or to register go to the OSA 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 Workshop on the Calculation and Measurement of Obtrusive Light May 21 - 22, 2020, Ostrava, Czech Republic. This workshop is being hosted jointly by Division 4 and the Technical University of Ostrava. Its goal is to bring together professionals from different disciplines to discuss and outline future directions of investigation, research, development and standardization in the field of obtrusive light and light pollution. The event is  scheduled during the new moon phase of May and will include practical measurements of sky glow when road lighting of an urban area is on and off. Anyone interested in the negative effects of artificial light on the nighttime environment should consider attending this workshop. Further details will be provided as they become available.

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 2019. 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 4-59: Guide for Lighting Urban Elements 
TC 4-60: Road Traffic Lights - Photometric Properties of Roundel Signals
TC 4-61: Artificial Lighting and its Impact on the Natural Environment
JTC 18: (D3/D4): Lighting Education

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.