COMMISSION INTERNATIONALE DE L'ÉCLAIRAGE - Hongrie

INTERNATIONAL COMMISSION ON ILLUMINATION CIE - Hungary

INTERNATIONALE BELEUCHTUNGSKOMMISSION CIE - Ungarn
CIE PRESS RELEASE

September 2013

Review of Lighting Quality Measures for
Interior Lighting with LED Lighting Systems

CIE 205:2013                                       ISBN 978-3-902842-46-6                                         

With recent increases in luminous flux and efficacy, LEDs have started to compete with conventional light sources in luminaires for general lighting. Typical LED characteristics, such as directional light, small size and high brightness are as such not new light source characteristics; nonetheless they are (alone or as combination) new characteristics in some areas of functional interior lighting, such as offices, class rooms, meeting rooms or patient rooms. Most existing quality measures for those applications are derived from research with and referring to the use of diffuse fluorescent lighting. This report provides information on the suitability of existing lighting quality measures when applied to (commercial) interior LED lighting systems. It identifies the gaps and weaknesses in existing quality measures, recommends new quality measures and includes suggestions for required research.

The publication is written in English, with a short summary in French and German. It consists of 34 pages with 3 figures and 1 table and is readily available at the National Committees of the CIE or via the CIE Webshop. (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

The price of this publication is EUR 84,- (Members of the National Committees of the CIE get 66,7 % discount.)


May 2013

Methods for Re-defining CIE D Illuminants

CIE 204:2013                                       ISBN 978-3-902842-45-9                                         

This Technical Report gives an overview of the construction of the tables describing CIE D illuminants, and proposes two methods to smooth the daylight illuminant spectral power distributions. The first method keeps the values originally determined at the integer 10 nm intervals unchanged and interpolates between these fixed points to get smooth (twice differentiable) curves (minimal smoothing method). A second alternative method smoothes more strongly, cutting fine structure maxima and minima of the spectrum (highly smoothing method).

Examples show the consequences of both methods, pointing out that smoothing has little influence on colorimetric accuracy.

The Technical Committee recommends testing the provided tables based on the two smoothing algorithms in practice and to urge users to test data of Table 4 which are based on the highly smoothing method, and ask instrument constructors to test the method for building D illuminant simulators with the eventual outcome of defining a CIE D50 and D65 standard source.

The publication provides a link to two Excel files: one for calculation of the SPD of a daylight illuminant for the different interpolation methods described in this report after input of a required CCT and another one providing the tables of the report .

The publication is written in English, with a short summary in French and German. It consists of 75 pages with 13 figures and 5 tables and is readily available at the National Committees of the CIE or via the CIE Webshop. (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

Price of this CIE International Standard: EUR 108,- (Members of the National Committees of the CIE get 66,7 % discount.)


May 2013

Characterization of the Performance of Illuminance Meters and Luminance Meters

CIE International Standard                                        S 023/E:2013                                          

This CIE International Standard defines quality indices characterizing the performance of illuminance and luminance meters in a general lighting measurement situation, as well as measurement procedures for the individual indices and standard calibration conditions.

Measurements of illuminance or luminance and their accuracy are influenced by various parameters, such as operational conditions, properties of light sources, as well as characteristics of the applied photometers. The characteristics of these photometers alone do not allow the determination of the measurement uncertainty for
a specific measurement task. Nevertheless, it is generally true that instruments with "better" characteristics in most cases produce smaller uncertainties than instruments with "worse" properties. This Standard has been written to:

- give clear and unambiguous definitions for the individual quality indices;
- define measurement procedures and methods for numerical evaluation of thesequality indices;
- define calibration conditions for illuminance meters and luminance meters.

Where different, the definitions of the quality indices and the associated measurement procedures and methods for numerical evaluation given in this Standard supersede those given in CIE Publication 53-1982. CIE publication 69-1987 shall be superseded by this Standard.

It is readily available at the National Committees of the CIE or via the CIE Webshop. (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

Price of this CIE International Standard: EUR 135,- (Members of the National Committees of the CIE get 66,7 % discount.)


April 2013

Proceedings of the CIE Centenary Conference
"Towards a New Century of Light"
Paris, France, 15-16 April 2013

CIE x038:2013                                          ISBN 978-3-902842-44-2                                             

In April 2013 CIE celebrated its 100th birthday in the course of its Midterm Meeting in Paris, France. The meeting was accompanied by a 2-days conference on the subject "Towards a New Century of Light". In 2 keynote speeches, 60 oral presentations and 134 posters experts from all over the world presented latest research results and survey lectures on various subjects related to light and lighting, e.g. "History of Lighting and Art", "Hot Topics in Outdoor Lighting", "Colour Quality Assessment", "Health and Wellbeing", "Workplace Lighting Concepts", "Hot Topics in Interior Lighting", "Advanced Correction Methods for Spectroradiometry", "Lighting the City - Applications and Economics", "Integrating Daylight and Electric Lighting", "LED Photometry and Performance of Photometers", "Lighting the City - Luminaires and Design", "Concepts in Lighting Quality", "Brightness and Colour, Individual or Shared Percepts", "Lighting the City - Spaces", "Wellbeing, Glare and Comfort".

The Proceedings of this Conference consist of 1261 pages including 173 papers of oral and poster presentations with some 1200 figures and some 300 tables.

The publication is readily available at the National Committees of the CIE or at the web shop of the CIE (http://www.techstreet.com/cgi-bin/joint.cgi/cie).

The price of this publication is EUR 300,-

(Members of the National Committees of the CIE get 66,7 % discount.)


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