CIE Publications News

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CIE x043:2016
Proceedings of the 4th CIE Expert Symposium on Colour and Visual Appearance 6 – 7 September 2016, Prague, Czech Republic, September 2016. Visual assessment of the appearance of objects and materials involves aspects such as the object itself and its optical characteristics; the position, size, shape and spectrum of the light source; the nature of the visual field surrounding the object; and the observer’s visual system with its amazing complexity. Research areas have been formed which are devoted to the four visual attributes: colour, gloss, texture and translucency. The development of new visual appearance effects, such as goniochromatism and graininess, have required progress and evolution in the quantification of visual appearance and corresponding measurement setups. The outcome of research in this area is significant for industrial sectors where the measurement of visual appearance is important and for manufacturers of measurement equipment. During this joint symposium of CIE Divisions 1 and 2 presentations were given on the state of the art in our understanding of the perception of the visual attributes; the latest achievements in the fields of novel measurement methodologies; and possible applications of visual appearance knowledge and novel measurement methodologies for the design and characterization of modern optical surfaces. The publication consists of 508 pages including 65 contributions and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 220:2016
Characterization and Calibration Methods of UV Radiometers, September 2016. This technical document prepared by CIE Technical Committee TC 2-47 describes quality indices for UV radiometers, which are helpful for manufacturers and users to characterize instruments on a common basis. To harmonize CIE documents, the quality indices described in this document relate to the quality indices described in Joint ISO/CIE International Standard ISO/CIE 19476:2014(E) (formerly CIE S 023/E:2013), and references are made to those where applicable. The defined spectra of reference sources for the characterization of UV radiometers are given in Annex A. This document also describes source-based and detector-based methods along with measurement conditions and limiting boundary conditions for the calibration of UV radiometers used for laboratory as well as industrial applications. The publication is written in English, with a short summary in French and German. It consists of 52 pages with three figures and three tables and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE TN 006:2016
Visual Aspects of Time-Modulated Lighting Systems – Definitions and Measurement Models, August 2016. The potential negative impact of temporal light artefacts has prompted lighting manufacturers, lighting application specialists, universities and governments to look for ways to measure the impact and come to a better understanding of the temporal quality aspects of lighting systems. In this context, the CIE formed Technical Committee (TC) 1-83 “Visual Aspects of Time-Modulated Lighting Systems”. This Technical Note (TN) is an intermediate product of the work of the TC. In the first part of the TN, new definitions for the perceptual effects modulated light can produce are given. In the second part, an overview of the relevant literature is given as well as an overview of the parameters that influence the visibility of the different TLAs. The last part gives a description of two methods, one in the time domain and one in the frequency domain, which can be used to quantify TLAs. Furthermore, three implementations of the general methods into specific visibility measures are given as an example. The publication is written in English, consists of 23 pages and is freely downloadable from the CIE webpage.

CIE 219:2016
Minimum Summer Levels of 25(OH)D during Winter by Minimal Exposure to Sunbeds: Requirements and Weighing the Advantages and Disadvantages, August 2016. Vitamin D is widely accepted as necessary for the regulation of calcium homeostasis and thus a healthy skeleton. Strictly a pro-hormone, it is unique amongst vitamins in having a second source pathway that is independent of oral intake: a major source of the vitamin is through synthesis in the skin. For those living at middle to high latitudes there is a period of the year when it is impractical to synthesize any appreciable vitamin D in the skin through exposure to solar UV radiation. To prevent a decline in vitamin D status an alternative source of the vitamin may be required at these times. This may be through diet (most usually low in vitamin D), supplementation, or an alternative source of UV radiation: the sun (by travelling to lower latitudes) or an artificial source. It has been shown, by reference to published work and calculations presented here, that it is possible to raise / maintain vitamin D levels using artificial UV radiation as emitted by commercial sunbeds. However, current sunbeds available on the high street are not designed or optimized for this purpose, and provide a significantly higher UV-A burden than sunlight for the same vitamin D potential. Unless and until publicly available sunbeds are fully characterized for their ability to initiate previtamin D synthesis they cannot be recommended as a safe and effective method of maintaining vitamin D status because the appropriate exposure (e.g. duration and frequency of use for this purpose) cannot be assessed. Sources designed specifically for the purpose, with a lower UV-A burden and clear application guidelines, would be more appropriate facilities for those who choose to gain vitamin D through artificial UV exposure, rather than by other means. The publication is written in English, consists of 29 pages and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 218:2016
Research Roadmap for Healthful Interior Lighting Applications, May 2016. Although light is defined as electromagnetic radiation that provides the stimulus for vision, we now know conclusively that ocular detection of this signal also has many other physiological and psychological effects in humans and other organisms. This knowledge has led some to argue for rapid adoption of lighting recommendations that incorporate “lighting for health” elements, whereas others have argued that a more cautious approach would be wiser. The report delivers a research roadmap of questions in themed groups: Fundamental Processes, Daily Pattern, Longer Patterns, Application, Application – Specific, and Individual Differences. The roadmap indicates the ease with which each question might be answered and its importance to lighting application in the short term. The publication is written in English, consists of 47 pages and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE TN 005:2016
Specifying Product Performance for Mesopic Applications, May 2016. This Technical Note gives guidance on specifying the performance of lighting products for applications such as lighting of roads and pedestrian areas at night, where the eye is adapted to mesopic conditions. It can be used in conjunction with CIE 191:2010 Recommended System for Mesopic Photometry based on Visual Performance, which gives details of the method to be used to calculate mesopic quantities. The publication is written in English, consists of 8 pages and is freely downloadable from the CIE webpage.

CIE TN 004:2016
The Use of Terms and Units in Photometry – Implementation of the CIE System for Mesopic Photometry, May 2016. This Technical Note gives guidance on the use of terms and units in photometry, particularly in relation to terms and units applicable for mesopic photometry. It can be used in conjunction with CIE 191:2010 Recommended System for Mesopic Photometry based on Visual Performance, which gives details of the method that should be used to calculate mesopic quantities and is fully compliant with the requirements of the SI system and the principles governing photometry, as published by the Bureau International des Poids et Mesures (BIPM). The publication is written in English, consists of 11 pages and is freely downloadable from the CIE webpage.

CIE 217:2016
Recommended Method for Evaluating the Performance of Colour-Difference Formulae, February 2016. A method is recommended to evaluate the strength of the relationship between visually-perceived colour differences in a given set of colour pairs and their corresponding predictions made by a colour-difference formula. This method is based on the Standardized Residual Sum of Squares (STRESS) index used in multidimensional scaling, and tests if two colour-difference formulae are or are not statistically significantly different. The publication is written in English, consists of 28 pages with 1 figure and 11 tables and is readily available at the national Committees of the CIE or via the CIE Webshop.

CIE x041:2016
Proceedings of CIE Expert Symposium on the CIE S 025 LED Lamps, LED Luminaires and LED Modules Test Standard, January 2016. This CIE Expert Symposium was organized by CIE Division 2 in cooperation with Physikalisch-Technische Bundesanstalt PTB and CIE Central Bureau, and was hosted by the PTB at their laboratories in Braunschweig, Germany. The Symposium featured contributed papers of leading experts in photometry and radiometry presenting facts and recent research related to the CIE International Standard S 025 Test Method for LED Lamps, LED Luminaires and LED Modules. The publication is written in English, consists of 94 pages including 11 contributions and is readily available at the national Committees of the CIE or via the CIE Webshop.

CIE 170-2:2015
Fundamental Chromaticity Diagram with Physiological Axes- Part 2: Spectral Luminous Efficiency Functions and Chromaticity Diagrams, November 2015. CIE established the Technical Committee TC 1-36 with the following Terms of Reference: “Establish a fundamental chromaticity diagram of which the coordinates correspond to physiologically significant axes”. Part 1 of the report is presented in CIE 170-1 Fundamental Chromaticity Diagram with Physiological Axes – Part 1: Definition of CIE 2006 Cone Fundamentals. It is limited to the choice of a set of colour-matching functions (CMFs) and estimates of cone fundamentals for the normal observer, randing in visual angle (field size) from 1″ to 10″. This report, entitled Part 2, aims at providing the user with practical colorimetric tools, in the form of chromaticity diagrams. The publication is written in English, consists of 72 pages with 11 figures and 8 tables and is readily available at the national Committees of the CIE or via the CIE Webshop.

CIE International Standard S 017-SP1/E:2015
ILV: International Lighting Vocabulary – Supplement 1: Light Emitting Diodes (LEDs) and LED Assemblies – Terms and Definitions, 2015, October 2015. This standard, published as supplement to the CIE International Standard S 017/E:2015 “ILV: International Lighting Vocabulary”, summarizes the most important terms and definitions in the field of lighting by inorganic semiconductors used in CIE documents. The terms and definitions of this standard are intended to become part of the International Lighting Vocabulary. This CIE International Standard has been approved by the CIE National Committees. It is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE TN 003:2015
Report on the First International Workshop on Circadian and Neurophysiological Photometry, 2013, July 2015. This Technical Note deals with the role of the eye in processing light information and the measurement of the eye’s light exposure, with particular emphasis on the physiological or photobiological effects whose distinction from visual perception has become widely recognized since the discovery of melanopsin in human retinal ganglion cells. The technical note summarizes the proceedings and consensus of The 1st International Workshop on Circadian and Neurophysiological Photometry (“IWCNP 2013″, the “Workshop”) and aims to provide an interpretation for governments, the lighting community and professionals working in public health, and to highlight the importance of scientific advances and the growing evidence base in this area. The publication is written in English, consists of 39 pages and is freely downloadable from the CIE Webpage.

CIE S 025/E:2015
Test Method for LED Lamps, LED Luminaires and LED Modules, March 2015. This Standard provides requirements to perform reproducible photometric and colorimetric measurements on LED lamps, LED modules, and LED luminaires (LED devices). It also provides advice for the reporting of data. The availability of reliable and accurate photometric data for LED devices is a basic requirement for designing good lighting systems and evaluating performance of products. The standard aims in particular to cover measurement methods for testing the compliance of LED devices with the photometric and colorimetric requirements of LED performance standards issued by IEC/TC 34 “Lamps and related equipment”. As LED devices offer a large variety of configurations in respect to geometry and/or colour, the photometric and colorimetric performances are considered individually for each configuration. This CIE International Standard has been approved by the CIE National Committees. It is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE DIS 024/E:2015
Light Emitting Diodes (LEDs) and LED Assemblies – Terms and Definitions, March 2015. This Draft International Standard summarizes the most important terms and definitions in the field of lighting by inorganic semiconductors used in CIE documents, which are intended to become part of the International Lighting Vocabulary. The Draft International Standard replaces the withdrawn publication CIE DIS 024/E:2013. It has been sent to CIE Board of Administration, Division 2 and National Committees for comments and is sold to interested parties. It is still subject to changes and may not yet be referred to as a CIE International Standard. When approved by the CIE NCs, it will be published as a CIE International Standard and later on get part of the International Lighting Vocabulary. The Draft International Standard is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 215:2014
CIE Standard General Sky Guide, December 2014. This report collects information for the application of the CIE Standard General Sky for general users and designers. The guide provides an explanation of the CIE Standard General Sky concept, which is described in ISO 15469:2004/CIE S 011:2003, and of its simplified use by practitioners. The document includes an extensive list of references on the subject and gives recommendations for prediction methods, tools and computer programs. The publication is written in English, consists of 77 pages, and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 214:2014
Effect of Instrumental Bandpass Function and Measurement Interval on Spectral Quantities, November 2014. This report presents a detailed study of bandwidth correction applied to spectra encountered in radiometric, photometric and spectrophotometric measurements. The mechanism of broadening of data recorded by both scanning and array spectrometers, due to bandpass function effects, is discussed in detail, along with an historical study of methods currently applied. The report presents a bandwidth correction algorithm that can be used for any real bandpass function and provides both a step-by-step guide on how to apply that correction, and a discussion of the theoretical and experimental limits to its applicability. The publication is written in English, consists of 84 pages, and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE x040:2014
Proceedings of CIE Expert Symposium on Measurement Uncertainties in Photometry and Radiometry for Industry, October 2014. This Symposium was organized by CIE Division 2 in cooperation with the CIE Central Bureau, and was hosted by the CIE Central Bureau in Vienna, Austria. The Symposium featured contributed papers of leading experts in photometry and radiometry presenting facts and recent research in measurement uncertainties in photometry and radiometry, especially regarding application in industry. The publication consists of 78 pages including 11 contributions. CIE x040:2014 is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE TN 002:2014
Relating Photochemical and Photobiological Quantities to Photometric Quantities, October 2014. Optical radiation has different effects on biological systems. To quantify these effects usually the spectral distribution of a radiant quantity is weighted with the action spectrum of that effect. By this a relation between the photobiological and radiometric quantities is made. In very recent publications, mainly in the field of photobiological safety, a link between an actinic quantity and the corresponding photometric quantity is made mainly to give a simplified risk assessment procedure by means of absolute photometric measurements instead of absolute spectroradiometric measurements. This Technical Note proposes the definition of new terms relating photobiological or photochemical quantities to photometric quantities. It adheres to the correct use of units within the present International System of Units SI. The CIE publication is written in English, consists of 8 pages and is freely downloadable from the CIE webpage.

CIE DIS 025/E:2014
Test Method for LED Lamps, LED Luminaires and LED Modules, September 2014. This standard provides requirements to perform reproducible photometric and colorimetric measurements on LED lamps, LED modules, and LED luminaires (LED devices). It also provides advice for the reporting of the data. The availability of reliable and accurate photometric data for LED devices is a basic requirement for designing good lighting systems and evaluating performance of products. By obtaining these data through measurements in specific normalized measuring conditions, the consistency of the data should be ensured between different laboratories (within the limits of the declared measurement uncertainty) and comparison of different products on the same basis is possible. The standard aims in particular to cover measurement methods for testing the compliance of LED devices with the photometric and colorimetric requirements of LED performance standards issued by IEC TC 34 “Lamps and related equipment.” The Draft International Standard has been sent to CIE National Committees for comments and sales to interested parties. It is still subject to changes and may not yet be referred to as a CIE International Standard. When approved by the CIE NCs, it will be published as a CIE International Standard. The Draft International Standard is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 213:2014
Guide to Protocols for Describing Lighting, August 2014. Lighting quality encompasses human needs, architectural integration and economic constraints (including energy). To develop information about the luminous conditions that will fulfill lighting quality goals in various settings one needs to know how people respond, in the broadest sense, to electromagnetic radiation detected by the eye and processed by various physiological systems. Common definitions and measurement protocols for lighting installations are needed to support this work and to support communication with designers. This guide, the work of CIE Technical Committee 3-34, establishes a catalogue of application-independent descriptors of lighting and protocols associated with each descriptor. The committee developed a system of two categories of descriptors: basic descriptors, which ought to be reported in any project and which can generally be measured with relatively simple equipment, and specialized descriptors, which will not always be required and the measurement of which is more complex. This document is intended to aid the development of lighting quality concepts by providing a common basis for communication about the luminous conditions, existing or planned, in a space. By using the definitions provided here, and by following the protocols and the overall procedure, writers and readers alike can come to a deeper understanding of the physical conditions that stimulate human response to light in the built environment. The publication is written in English, with a short summary in French and German. It consists of 76 pages with 41 figures and 6 tables and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 212:2014
Guidance towards Best Practice in Psychophysical Procedures Used when Measuring Relative Spatial Brightness, July 2014. This report reviews evidence for the procedures and other factors of experiments carried out to investigate relative spatial brightness, making recommendations of those aspects that ought to be considered as essential, or at least desirable, for best practice. These factors include the size and complexity of the visual field employed in trials, evaluation mode (separate, simultaneous, sequential or successive) and experimental biases associated with selection of stimulus range and response mode. The proposals are presented as recommendations and not as compulsory. The report identifies those issues for which further research is desirable. The publication is written in English, with a short summary in French and German. It consists of 65 pages with 13 figures and 12 tables and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE TN 001:2014
Chromaticity Difference Specification for Light Sources, July 2014. Chromaticity difference of light sources needs to be specified in many cases, for example for angular colour uniformity, shift of colour during lifetime (colour maintenance) and individual colour variation of products. This Technical Note gives background information on the subject, presents models for the description of chromaticity differences and gives recommendations for the specification of chromaticity tolerances for light sources. The publication is written in English, consists of 9 pages with 3 figures and 1 table and is freely downloadable from the CIE webpage.

Joint ISO/CIE International Standard 19476:2014(E)
Characterization of the Performance of Illuminance Meters and Luminance Meters, July 2014. This joint ISO/CIE International Standard is replacing CIE International Standard CIE S 023/E:2013 without modification of its technical content. The 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. 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 has been superseded by this standard. This ISO/CIE International Standard has been approved by the CIE National Committees and by ISO. It is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 211:2014
Colour Appearance in Peripheral Vision, June 2014. This report describes colour zone maps, which are the contour maps showing unique hue components for the red, dark yellow, yellow, green and blue stimuli, over the entire visual expanse based on experimental results using hue and saturation judgements. Characteristics of colour-appearance change in the entire visual expanse show basically the same tendency as those in previous studies using a similar method. Estimation of a unique hue component in a peripheral position utilizing the colour zone map is described with an example. The publication is written in English, with a short summary in French and German. It consists of 22 pages with 7 figures and 1 table and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE x039:2014
Proceedings of CIE 2014 Lighting Quality & Energy Efficiency, Kuala Lumpur, Malaysia, June 2014. In April 2014 the Lighting Quality & Energy Efficiency Conference took place in Kuala Lumpur, Malaysia. The event gave academics, lighting industry professionals, designers, researchers and representatives of regulatory authorities the opportunity to discuss best practice and the latest developments in the field of light and illumination. Recommendations were also made for reducing the amount of energy used for lighting. One of the hottest topics at the conference was light emitting diodes (LEDs), which offer significant environmental and energy-efficiency benefits compared with conventional lamps. The Proceedings of this Conference include invited papers and papers of the oral and poster presentations. The publication consists of 981 pages including 126 contributions. CIE x039:2014 is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 210:2014
Photometry Using V(λ)-Corrected Detectors as Reference and Transfer Standards, May 2014. This publication provides recommendations of the CIE concerning the use of V(λ)-corrected detectors as reference and transfer standards for photometric units. Specifically it includes the construction, characterization and directions for use of standard photometers for such purposes. The publication is written in English, with a short summary in French and German. It consists of 34 pages with 11 figures and is readily available at the National Committees of the CIE or via the CIE Webshop.

CIE 209:2014
Rationalizing Nomenclature for UV Doses and Effects on Humans, April 2014. The field of atmospheric ultraviolet radiation (UV) research is plagued with difficulties in nomenclature. The problems arise from (a) the strong wavelength dependence of UV radiation received at the Earth’s surface, (b) the ad-hoc way disparate groups have approached the subject and (c) the incorrect use of units when action spectra for different UV effects are incorporated. This report highlights some of the issues, taking vitamin-D synthesis, a beneficial effect, as a specific example. Standard vitamin-D dose (SDD) and minimum vitamin-D dose (MDD) are proposed, analogous to the standard erythema dose (SED) and minimum erythema dose (MED) that are in common use for erythema. In recognition of the fact that currently accepted action spectra may be revised in future if new data become available, it is recommended that spectrally resolved irradiance measurements are maintained and continued so that biologically effective irradiances and doses may be reprocessed. The joint publication of CIE and the World Meteorological Organization (WMO) is written in English, with a short summary in French and German. It consists of 20 pages with 3 figures and 1 table and is readily available for free download on the CIE webpage.

CIE 203:2012
A Computerized Approach to Transmission and Absorption Characteristics of the Human Eye, April 2012. There has long been a need for a series of reference spectral transmission and absorption data for the human eye for applications in eye research and optical safety studies. TC 6-15 collected spectral data from the literature and determined from that literature the best form for the wavelength dependence of the transmission and absorption of the components of the human eye. After critical review, the data have been compiled in tabular form in comma-delimited computer-accessible data files. The tabulated data consist of the transmission and absorption data of the clear ocular media, including the cornea, the aqueous, the lens, and the vitreous of the young (< 10 years old) human eye and the rhesus eye for the wavelength range of 0,2 μm to 2,5 μm. Transmittance data of the total clear ocular media in the human eye for the wavelength range 0,3 μm to 0,7 μm and for ages between 1 year and 100 years are also tabulated. These data can be downloaded by readers of this Technical Report from the CIE website. The publication is written in English, with a short summary in French and German. It consists of 66 pages with 23 figures and 9 tables. This publication is available via the website of the CIE Central Bureau.

CIE 202:2011
Spectral Responsivity Measurement of Detectors, Radiometers and Photometers, December 2011.  This Technical Report gives recommendations for spectral radiant power, irradiance and radiance responsivity measurement of single element detectors in the 200 nm to 2 500 nm wavelength range. It covers measurement setups and methods, summarizes the types and basic properties of typical detectors, radiometers and photometers, and gives guidance on how to choose a reference detector. Primary detector standards and procedures for the realization of units and responsivity functions are the responsibility of national metrology institutes and are not discussed in this report. This publication supersedes CIE 64-1984 “Determination of the Spectral Responsivity of Optical Radiation Detectors.” The publication is written in English, with a short summary in French and German. It consists of 82 pages with 41 figures.  This publication is available via the website of the CIE Central Bureau.

CIE 201:2011
Recommendations on Minimum Levels of Solar UV Exposure, November 2011.  This Technical Report addresses the issue of sensible exposure to solar ultraviolet (UV) radiation. The scientific evidence of beneficial effects of solar exposure has been reviewed, in particular on the incidence and mortality to cancers other than skin cancer. Although the evidence is not unequivocal, the committee has found considerable evidence to deem it plausible that solar exposure may reduce the incidence and mortality of colorectal cancer. The evidence for similar effects on breast and prostate cancer and on melanoma is less, but such effects are considered as plausible, too. Possibly the production of vitamin D plays a role in this respect. The report is split into two parts: The first part (Part I) gives guidance for a sensible exposure regime to profit from beneficial health impacts from moderate solar (UV) exposure, the second part (Part II) is a review of scientific data that underpin the guidance in Part I. The publication is written in English, with a short summary in French and German. It consists of 88 pages with 4 figures and 20 tables.  This publication is available via the website of the CIE Central Bureau.

CIE 200:2011
CIE Supplementary System of Photometry, October 2011.  The CIE Supplementary System of Photometry evaluates lights in terms of comparative brightness relationship at any level. The system introduces the concept of equivalent luminance to describe brightness of a light or an object at any level including mesopic levels. The system develops a photometric model to calculate brightness-related equivalent luminance by using three components of existing photometric and colorimetric quantities. The use of the system and an example of calculation are also described. Results of testing the system with experimental brightness matching data are given in an appendix. The publication is written in English, with a short summary in French and German. It consists of 21 pages with 5 figures and 1 table.  This publication is available via the website of the CIE Central Bureau.

CIE 197:2011
Proceedings of the 27th Session of the CIE, 9 – 16 July 2011, Sun City, South Africa.  The Proceedings of the 27th Session of the CIE comprise two volumes. Volume 1, subdivided into two parts, contains on 1230 pages the texts of the Invited Papers, Presented Papers and Posters presented at the Session as well as the Introductions to the Workshops.  Volume 2 contains the official reports of the administrative and technical meetings of the Session, thus presenting an overview on the technical work in CIE achieved during the quadrennium. This two part publication is available via the website of the CIE Central Bureau.

CIE 199:2011
Methods for Evaluating Colour Differences in Images, September 2011, Bern, Switzerland. This Technical Report is concerned with the evaluation of colour differences between two similar images where the output media and the output viewing conditions are similar for both images. The publication is written in English, with a short summary in French and German. It consists of 50 pages with 22 figures and 7 tables. This publication is available via the website of the CIE Central Bureau.

CIE Standard S 017/E:2011
ILV: International Lighting Vocabulary, August 2011, Bern, Switzerland. CIE has published Standard CIE S 017/E:2011 ILV: International Lighting Vocabulary. This new edition of the International Lighting Vocabulary (ILV) is the result of intensive work carried out by the Divisions of the CIE to update, and supplement where necessary, the contents of the previous edition (1987). Many new terms have been added, to reflect changes in technologies and practices, existing terms have been updated as necessary, and obsolete terms have been removed. The Standard comprises 203 pages and presents the definitions of 1448 terms related to light and lighting. This publication is available via the website of the CIE Central Bureau.

CIE Standard S 014-3/E:2011
Colorimetry – Part 3: CIE Tristimulus Values, July 2011, Bern, Switzerland. Colour stimuli with different spectral distributions can look alike. An important function of colorimetry is to determine which stimuli look alike to a given observer with a given set of colour-matching functions. This Standard is based on long-standing CIE recommendations (CIE15:2004 Colorimetry, 3rd edition) for the calculation of tristimulus values. This publication is available via the website of the CIE Central Bureau.

CIE x036:2010
Proceedings of CIE Expert Symposium on Spectral
and Imaging Methods for Photometry and Radiometry
, 30-31 August 2010, Bern, Switzerland. The publication consists of 163 pages including 35 contributions with 169 figures and 20 tables. This publication is available via the website of the CIE Central Bureau.

CIE 192:2010
Practical Daylight Sources for Colorimetry
This publication discusses the state-of-the-art of practical daylight sources for colorimetry. It provides information on these lamps and devices used for illumination in the visual evaluation and instrumental measurement of non-fluorescent and fluorescent specimens. This publication is available via the website of the CIE Central Bureau.

CIE 191:2010
Recommended System for Mesopic Photometry Based on Visual Performance
This report deals with visual task performance based approaches to mesopic photometry, with a major aim to establish appropriate mesopic spectral sensitivity functions to serve as the foundation of a system of mesopic photometry. A review of the most important visual tasks and the range of visual

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