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EUROPEAN STANDARD
NORME EUROPENNE
EUROPISCHE NORM
EN 12665
May 2002
ICS 01.040.91; 91.160.01
English version
Light and lighting - Basic terms and criteria for specifying lightingrequirements
Lumire et clairage - Termes de base et critres pour laspcification des exigences en clairage
Licht und Beleuchtung - Grundlegende Begriffe undKriterien fr die Festlegung von Anforderungen an die
Beleuchtung
This European Standard was approved by CEN on 21 January 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMIT E UROP E N DE NORMAL ISAT ION
EUROPISCHES KOMITEE FR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
2002 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.
Ref. No. EN 12665:2002 E
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Contentspage
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Terms and definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Framework for the specification of lighting requirements . . . . . . . . . . . . . . . . . . . . 17
Annex A (informative): Additional explanation of defined terms . . . . . . . . . . . . . . . . . 19
Annex B (informative): Index of terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Annex C (informative): A-deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
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Foreword
This document EN 12665:2002 has been prepared by Technical Committee CEN/TC 169 "Light and lighting", thesecretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latestby November 2002.
Annexes A, B and C are informative.
This standard includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.
Introduction
This European Standard sets out a basic framework to be used for the specification of lighting requirements.
Terms common to many applications are defined here. Additional terms specific to particular applications are definedin the relevant standard setting out the requirements for that application.
Where a term is contained in CIE Publication 17.4/1987 International Lighting Vocabulary (IEC Publication 50International Electrotechnical Vocabulary, Chapter 845 Lighting), the term given in this standard is identical. Forsome terms additional explanation is given in Annex A.
The lighting requirements for a space are determined by the need to provide:
adequate illumination for safety and movement; conditions which will facilitate visual performance and colour perception; acceptable visual comfort for the occupants in the space.
The relative importance of these factors will vary for different applications. The lighting requirements for visualcomfort and satisfaction of the occupants, will often exceed the requirements for visual performance alone. Forexample, the visual task may simply require the discrimination of black symbols on a white background; the colourrendering of the lighting is irrelevant to this task but it is important in making the appearance of the room andoccupants acceptable. Variations of the lighting in space and time may also be important for visual satisfaction andcan help to meet the interpersonal differences found within groups of people.
Considerations should also be given to the energy used by lighting and to maintenance.
The parameters which need to be specified to ensure good visual conditions and an efficient lighting installation arecommon to many applications. These are dealt with in clause 4 of this standard.
1 Scope
This standard defines basic terms for use in all lighting applications; specialist terms with limited applications aregiven in individual standards. This standard also sets out a framework for the specification of lighting requirements,giving details of aspects which shall be considered when setting those requirements.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).
CIE 17.4:1987 International Lighting Vocabulary - Chapter 845: Lighting
ISO/CIE 10527 CIE standard colorimetric observers
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3 Terms and definitions
For the purposes of this European Standard the following terms and definitions apply.
3.1 Eye and Vision
3.1.1
adaptationprocess by which the state of the visual system is modified by previous and present exposure to stimuli that mayhave various luminances, spectral distributions and angular subtanses
NOTE 1 The terms light adaptationand dark adaptationare also used, the former when the luminances of the stimuli are of at
least several candelas per square metre, and the latter when the luminances are of less than some hundredths of a candela per
square metre.
NOTE 2 Adaptation to specific spatial frequencies, orientations, sizes, etc. are recognized as being included in this definition.
[IEC 50 (845)/CIE 17.4:1987; 845-02-07]
3.1.2accommodationadjustment of the dioptric power of the crystalline lens by which the image of an object, at a given distance, isfocused on the retina [IEC 50 (845)/CIE 17.4:1987; 845-02-44]
3.1.3visual acuity1. Qualitatively: Capacity for seeing distinctly fine details that have very small angular separation.2. Quantitatively: Any of a number of measures of spatial discrimination such as the reciprocal of the value of theangular separation in minutes of arc of two neighbouring objects (points or lines or other specified stimuli) which theobserver can just perceive to be separate [IEC 50 (845)/CIE 17.4:1987; 845-02-43]
3.1.4brightness: luminosity(obsolete)attribute of a visual sensation according to which an area appears to emit more or less light. [IEC 50 (845)/CIE17.4:1987; 845-02-28]
3.1.5contrast1. In the perceptual sense: Assessment of the difference in appearance of two or more parts of a field seensimultaneously or successively (hence: brightness contrast, lightness contrast, colour contrast, simultaneous contrast,successive contrast, etc.) .2. In the physical sense: Quantity intended to correlate with the perceived brightness contrast, usually defined byone of a number of formulae which involve the luminances of the stimuli considered, for example: L/Lnear theluminance threshold, or L1/L2for much higher luminances.[IEC 50 (845)/CIE 17.4:1987; 845-02-47]
3.1.6
brightness contrastsubjective assessment of the difference in brightness between two or more surfaces seen simultaneously orsuccessively
3.1.7colour contrastsubjective assessment of the difference in colour between two or more surfaces seen simultaneously or successively
3.1.8glarecondition of vision in which there is discomfort or a reduction in the ability to see details or objects, caused by anunsuitable distribution or range of luminance, or to extreme contrasts [IEC 50 (845)/CIE 17.4:1987; 845-02-52]
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IEC 50 (845)
3.1.10visual fieldarea or extent of physical space visible to an eye at a given position and direction of view
NOTE It should be stated whether the visual field is monocular or binocular.
3.1.11visual performanceperformance of the visual system as measured for instance by the speed and accuracy with which a visual task isperformed [IEC 50 (845)/CIE 17.4:1987; 845-09-04]
3.1.12visual comfort:subjective condition of visual well-being induced by the visual environment
3.2 Light and Colour
3.2.1luminous flux ()quantity derived from radiant flux e by evaluting the radiation according to its action upon the CIE standardphotometric observer. For photopic vision
where
is the spectral distribution of the radiant flux and V() is the spectral luminous efficiency.
unit: lm
NOTE For the values of Km (photopic vision) and K m (scotopic vision), see IEC 50 (845)/CIE 17.4:1987; 845-01-56.
[IEC 50 (845)
3.2.2luminous intensity ()
IEC 50 (845)
3.2.3luminance (L)
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NOTE See notes 1 to 5 to IEC 50 (845)/CIE 17.4:1987; 845-01-34.
IEC 50 (845)
3.2.4average luminance (L)
3.2.5minimum luminance (Lmin)
NOTE The relevant points at which the luminances are determined should be specified in the appropriate application standard.
unit:
3.2.6maximum luminance (Lmax)
NOTE The relevant points at which the luminances are determined should be specified in the appropriate application standard.
unit:
3.2.7
maintained luminance (Lm)
3.2.8initial luminance (Li)
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3.2.9luminance contrast
IEC 50 (845)
NOTE Luminance contrast may be defined as luminance ratio
C1=L2/L1(usually for successive stimuli),
or by the following formula
C2= (L2- L1) /L1 (usually for surfaces viewed simultaneously),
when the areas of different luminance are comparable in size and it is desired to take an average, the following formula may be
used instead
C3= (L2- L1) / 0,5(L2 + L1)
where
L1 is the luminance of the background, or largest part of the visual field;
L2 is the luminance of the object.
3.2.10luminance uniformity
NOTE Use is also made of the ratio of minimum luminance to maximum luminance in which case this should be specified
explicitly.
3.2.11illuminance (E)
IEC 50 (845)
3.2.12average illuminance (E)
NOTE In practice this may be derived either from the total luminous flux falling on the surface divided by the total area of the
surface, or alternatively from an average of the illuminances at a representative number of points on the surface.
3.2.13minimum illuminance (Emin)
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NOTE The relevant points at which the illuminances are determined should be specified in the appropriate application standard.
3.2.14maximum illuminance (Emax)highest illuminance at any relevant point on the specified surface
unit : lx
NOTE The relevant points at which the illuminances are determined should be specified in the appropriate application standard.
3.2.15maintained illuminance (Em)value below which the average illuminance on the specified area should not fall. It is the average illuminance at thetime maintenance should be carried out
unit : lx
3.2.16initial illuminance (Ei)
3.2.17spherical illuminance (Eo)
IEC 50 (845)
3.2.18hemispherical illuminance (Ehs)
3.2.19cylindrical illuminance (Ez)
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3.2.20semi-cylindrical illuminance (Esz)
3.2.21illuminance uniformity
NOTE Use is also made of the ratio of minimum illuminance to maximum illuminance in which case this should be specified
explicitly.
3.2.22reference surface
3.2.23disability glare
3.2.24discomfort glare IEC 50 (845)
3.2.25veiling reflections
3.2.26luminous environment
3.2.27colour rendering
NOTE In German, the term Farbwiedergabe is also applied to colour reproduction.
[IEC 50 (845)/CIE 17.4:1987; 845-02-59]
3.2.28CIE 1974 general colour rendering index [Ra] IEC 50(845)
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3.2.29colour stimulus
3.2.30tristimulus values
NOTE In the CIE standard colorimetric systems, the tristimulus values are represented by the symbols X,Y, Zand X10, Y10,Z10.
[IEC 50 (845)/CIE 17.4:1987; 845-03-22]
3.2.31chromaticity coordinates
NOTE 1 As the sum of the three chromaticity coordinates equals 1, two of them are sufficient to define a chromaticity.
NOTE 2 In the CIE standard colorimetric systems, the chromaticity coordinates are presented by the symbols x,y zand x10, y10,
z10.
[IEC 50 (8745)/CIE 17.4:1987; 845-03-33]
3.2.32chromaticity
IEC 50 (845)
3.2.33colour temperature (Tc)
NOTE The reciprocal colour temperature is also used, unit K-1.
[IEC 50 (845)/CIE 17.4:1987; 845-03-49]
3.2.34correlated colour temperature (Tcp)
NOTE 1 The recommended method of calculating the correlated colour temperature of a stimulus is to determine on a
chromaticity diagram the temperature corresponding to the point on the Planckian locus that is intersected by the agreed
isotemperature line containing the point representing the stimulus (see CIE Publication No 15).
NOTE 2 Reciprocal correlated colour temperature is used rather than reciprocal colour temperature whenever correlated colour
temperature is appropriate.
[IEC 50 (845)/CIE 17.4:1987; 845-03-50]
3.2.35fusion frequency; critical flicker frequency(for a given set of conditions)frequency of alternation of stimuli above which flicker is not perceptible [IEC 50 (845)/CIE 17.4:1987; 845-02-50]
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3.2.36reflectance ()
3.2.37transmittance ()
3.2.38absorptance ()
3.2.39photometry
3.3 Lighting equipment
3.3.1lamp
NOTE This term is also sometimes used for certain types of luminaires.
[
3.3.2ballast
NOTE A ballast may also include means for transforming the supply voltage, correcting the power factor and, either alone or in
combination with a starting device, provide the necessary conditions for starting the lamp(s).
3.3.3luminaire
NOTE The term lighting fittingis deprecated.
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3.3.4reference ballast
3.3.5reference lamp
3.3.6rated luminous flux
NOTE 1 The initial luminous flux is the luminous flux of a lamp after a short ageing period as specified in the relevant lamp
standard.
NOTE 2 The rated luminous flux is sometimes marked on the lamp.
NOTE 3 In French, formerly flux lumineux nominal.
[IEC 50 (845)/CIE 17.4:1987; 845-07-59]
3.3.7luminous efficacy of a source ()
NOTE It must be specified whether or not the power dissipated by auxiliary equipment such as ballasts, etc, if any, is included
in the power consumed by the source.
[IEC 50 (845)/CIE 17.4:1987; 845-01-55]
3.3.8light output ratio
NOTE For luminaires using incandescent lamps only, the optical light output ratio and the light output ratio are the same in
practice.
[IEC 50 (845)/CIE 17.4:1987; 845-09-39]
3.3.9light output ratio working (W)
3.3.10ballast lumen factor
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3.3.11downward light output ratio
NOTE For luminaires using incandescent lamps only, the optical light output ratio and the light output ratio are the same in
practice.
[
3.3.12upward light output ratio
NOTE For luminaires using incandescent lamps only, the optical light output ratio and the light output ratio are the same in
practice.
3.3.13(spatial) distribution of luminous intensity
3.3.14utilization factor
3.3.15utilance [U]
3.3.16lamp lumen maintenance factor
3.3.17lamp survival factor
3.3.18luminaire maintenance factor
3.3.19cut-off
NOTE In public lighting distinction is made between full-cut-off luminaires, semi-cut-off luminaires and non-cut-off
luminaires.
[
3.3.20cut-off angle
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3.4 Daylight
3.4.1solar radiation
3.4.2
direct solar radiation
3.4.3diffuse sky radiation
3.4.4global solar radiation
3.4.5sunlight
NOTE When dealing with actinic effects of optical radiations, this term is commonly used for radiations extending beyond the
visible region of the spectrum.
3.4.6skylight
NOTE When dealing with actinic effects of optical radiations, this term is commonly used for radiations extending beyond the
visible region of the spectrum.
3.4.7daylightvisible part of global solar radiation [
NOTE When dealing with actinic effects of optical radiation, this term is commonly used for radiations extending beyond the
visible region of the spectrum.
3.4.8daylight factor (D)ratio of the illuminance at a point on a given plane due to the light received directly or indirectly from a sky ofassumed or known luminance distribution, to the illuminance on a horizontal plane due to an unobstructedhemisphere of this sky. The contribution of direct sunlight to both illuminances is excluded
NOTE 1 Glazing, dirt effects, etc. are included.
NOTE 2 When claculating the lighting of interiors, the contribution of direct sunlight must be considered separately.
3.5 Lighting installations
3.5.1general lighting
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3.5.2localised lighting
3.5.3local lighting
3.5.4spacing
3.5.5spacing to height ratio
NOTE For indoor lighting the reference plane is usually the horizontal working plane; for exterior lighting the reference plane is
usually the ground.
3.5.6emergency lightinglighting provided for use when the supply to the normal lighting fails [
3.5.7direct lighting
3.5.8semi-direct lighting
3.5.9general diffused lighting
3.5.10semi-indirect lighting
3.5.11indirect lighting
3.5.12directional lighting
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3.5.13diffused lighting
3.5.14floodlighting
3.5.15 spotlighting
3.5.16stroboscopic effect
NOTE To obtain apparent immobilisation or constant change of movement, it is necessary that both the object movement and
the light intensity variation are periodic, and some specific relation between the object movement and light variation frequencies
exists. The effect is only observable if the amplitude of the light variation is above certain limits. The motion of the object may be
rotational or translational.
3.5.17installed loading
3.5.18light loss factor; maintenance factor
NOTE 1 The term depreciation factorhas been formerly used to designate the reciprocal of the above ratio.
NOTE 2 The light losses take into account dirt accumulation on luminaire and room surfaces and lamp depreciation.
IEC 50(845)/[CIE 17.4:1987; 845-09-59]
3.5.19room surface maintenance factorratio of room surface reflectance at a given time to the initial reflectance value (see also CIE 97)
3.5.20life of lighting installation
period after which the installation cannot be restored to satisfy the required performance because of non-recoverabledeteriorations
3.5.21maintenance cyclerepetition of lamp replacement, lamp/luminaire cleaning and room surface cleaning intervals (see also CIE 97)
3.5.22maintenance schedule
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3.6 Lighting measurements
3.6.1photometer
3.6.2colorimeter
3.6.3illuminance meter
3.6.4luminance meter
3.6.5reflectometer
3.6.6measurement field
3.6.7V() correction
3.6.8 cosine correction
NOTE For the ideal detector, the measured illuminance is proportonal to the cosine of the angle of incidence of the light. The
angle of incidence is the angle between the direction of the light and the normal to the surface of the detector.
4 Framework for the specification of lighting requirements
The principal design parameters which shall be considered when determining the lighting requirements for a specificapplication are described in 4.1 to 4.8. These parameters shall be specified in the form recommended in 4.1 to 4.8.For some of these parameters it has been possible to give a preferred set of values which shall be used. Additionalparameters may be required for some specific applications.
4.1 Illuminance
Illuminance shall be specified as maintained illuminance and shall take one of the following values of Em:
1 x 10Nlx; 1,5 x 10Nlx; 2,0 x 10Nlx; 3,0 x 10Nlx; 5,0 x 10Nlx; 7,5 x 10Nlx (where N is an integer).
The area over which the illuminance is to be calculated or measured shall be specified.
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4.2 Luminance
Luminance shall be specified as maintained luminance and shall take one of the following values of Lm:
1 x 10Ncd/m2; 1,5 x 10Ncd/m2; 2,0 x 10Ncd/m2; 3,0 x 10Ncd/m2; 5,0 x 10Ncd/m2; 7,5 x 10Ncd/m2(where N is aninteger).
The area over which the luminance is to be calculated or measured shall be specified.
4.3 Glare
4.3.1 Disability glare:Disability glare may be expressed in a number of different ways. If threshold increment isused the following values of TI shall be used (
4.3.2 Discomfort glare:
4.4 Colour
4.4.1 Colour rendering
4.4.2 Light source colour:
4.5 Energy
4.6 Maintenance
4.7 Measurements
4.8 Accuracy
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3.1.1 adaptation:
3.1.2 accommodation:
3.1.3 visual acuity:
NOTE Quantitatively, it can be expressed by the reciprocal of the angle, in minutes of arc, subtended at the entrance of the pupil
by the extremities of the detail separation which is just visible.
3.1.4 brightness:
3.1.8 glare:
3.2.1 luminous flux ():
NOTE 1 In this definition, the values used for the spectral sensitivity of the CIE standard photometric observer are those of the
spectral luminous efficiency function V().
NOTE 2 See IEC 50 (845)/ CIE 17.4:1987; 845-01-22 for the definition of spectral luminous efficency, 845-01-23 for the definition
of the CIE standard photometric observer and 845-01-56 for the definition of luminous efficacy of radiation. See ISO/CIE 10527.
to 3.2.2 luminous intensity (of a point source in a given direction) (I):Luminous flux per unit solid angle in thedirection in question, i.e. the luminous flux on a small surface, divided by the solid angle that the surface subtendsat the source (see also
NOTE The candela is the fundamental SI photometric unit. For its definition, see IEC 50 (845)/CIE 17.4:1987; 845-01-50.
to 3.2.3 luminance (L):Luminous flux per unit solid angle transmitted by an elementary beam passing through thegiven point and propagating in the given direction, divided by the area of a section of that beam normal to thedirection of the beam and containing the given point (see also
3.2.11 illuminance:
3.2.17 spherical illuminance smallsphere located at the specified point divided by the surface area of the sphere.
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to 3.2.19 cylindrical illuminance (Ez):
3.2.23 disability glare:
3.2.24 discomfort glare:
3.2.27 colour rendering :
3.2.28 general colour rendering index (Ra):
NOTE Ra is derived from the colour rendering indices for a specified set of 8 test colour samples. Rahas a maximum of 100,
which generally occurs when the spectral distributions of the light source and the reference light source are substantially identical.
(See CIE Publication 13.3).
to 3.2.30 tristimulus values: see also CIE 15.2.
to 3.2.31 chromaticity coordinates:see also CIE 15.2.
3.2.32 chromaticity:
3.2.33 colour temperature:
3.2.34 correlated colour temperature (Tcp):CIE Publication No 15 has now been replaced by CIE PublicationNo 15.2.
to 3.2.36 reflectance ():Ratio of the luminous flux reflected from a surface to the luminous flux incident on it.
NOTE The reflectance generally depends on the direction and spectral distribution of the incident light and on the surface finish.
to 3.2.37 transmittance ():Ratio of the luminous flux transmitted through a body to the luminous flux incident onit.
NOTE The transmittance generally depends on the direction and spectral distribution of the incident light and on the surface
finish.
3.2.38 absorptance ():
NOTE The absorptance generally depends on the direction and spectral distribution of the incident light and on the surface finish.
to 3.2.39 photometry:Measurement of quantities referring to radiation evaluated according to the spectral sensitivityof the human eye (as defined by the CIE standard photometric observer).
NOTE 1 The values usually used for the spectral sensitivity of the CIE standard photometric observer are those of the spectral
luminous efficiency function V().
NOTE 2 See IEC 50 (845)/CIE 17.4:1987; 845-01-22 for the definition of spectral luminous efficiency, 845-01-23 for the definition
of the CIE standard photometric observer and 845-01-56 for the definition of luminous efficacy of radiation. See ISO/CIE 10527.
to 3.3.6 rated lamp luminous flux:For most lamps, in reference conditions the lamp is usually operating at anambient temperature of 25oC in still air, freely suspended in a defined burning position and with a reference ballast,but see the relevant IEC standard for the particular lamp.
3.3.7 luminous efficacy:
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3.3.13 luminous intensity distribution :
3.3.14 utilization factor:
3.5.4 spacing CIE 17.4:1987; 845-09-64 for definition of light centre.
3.5.18 maintenance factor :
NOTE Maintenance factor of an installation depends on lamp lumen maintenance factor, lamp survival factor, luminaire
maintenance factor and (for an interior lighting installation) room surface maintenance factor.
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Annex B(informative)
Index of terms
absorptance 3.2.38accommodation 3.1.2
acuity, visual 3.1.3adaptation 3.1.1average illuminance 3.2.12average luminance 3.2.4
ballast 3.3.2ballast lumen factor 3.3.10brightness 3.1.4brightness contrast 3.1.6
chromaticity 3.2.32chromaticity coordinates 3.2.31colorimeter 3.6.2colour contrast 3.1.7colour rendering 3.2.27colour rendering index, general 3.2.28colour stimulus 3.2.29colour temperature 3.2.33colour temperature, correlated 3.2.34comfort, visual 3.1.12contrast 3.1.5contrast, luminance 3.2.9correlated colour temperature 3.2.34cosine correction 3.6.8critical flicker frequency 3.2.35cut-off 3.3.19cut-off angle 3.3.20cylindrical illuminance 3.2.19
daylight 3.4.7daylight factor 3.4.8diffuse sky radiation 3.4.3diffused lighting 3.5.13direct lighting 3.5.7direct solar radiation 3.4.2directional lighting 3.5.12disability glare 3.2.23discomfort glare 3.2.24downward light output ratio 3.3.11
efficacy, luminous 3.3.7emergency lighting 3.5.6
flicker 3.1.9flicker frequency,critical 3.2.35floodlighting 3.5.14flux, luminous 3.2.1flux, rated lamp luminous 3.3.6fusion frequency 3.2.35
general colour rendering index 3.2.28general diffused lighting 3.5.9general lighting 3.5.1
glare 3.1.8glare, disability 3.2.23glare, discomfort 3.2.24
global solar radiation 3.4.4
hemispherical illuminance 3.2.18
illuminance 3.2.11illuminance, average 3.2.12illuminance, cylindrical 3.2.19illuminance, hemispherical 3.2.18illuminance, initial 3.2.16illuminance, maintained 3.2.15illuminance, maximum 3.2.14illuminance meter 3.6.3illuminance, minimum 3.2.13illuminance, semi-cylindrical 3.2.20illuminance, spherical 3.2.17illuminance uniformity 3.2.21indirect lighting 3.5.11initial illuminance 3.2.16initial luminance 3.2.8installed loading 3.5.17
intensity, luminous 3.2.2intensity distribution, luminous 3.3.13
lamp 3.3.1lamp lumen maintenance factor 3.3.16lamp luminous flux, rated 3.3.6lamp survival factor 3.3.17life of lighting installation 3.5.20light loss factor 3.5.18light output ratio 3.3.8light output ratio, downward 3.3.11light output ratio, upward 3.3.12light output ratio working 3.3.9local lighting 3.5.3localised lighting 3.5.2luminaire 3.3.3luminaire maintenance factor 3.3.18luminance 3.2.3
luminance, average 3.2.4luminance contrast 3.2.9luminance, initial 3.2.8luminance, maintained 3.2.7luminance, maximum 3.2.6luminance, minimum 3.2.5luminance uniformity 3.2.10luminance meter 3.6.4luminous efficacy 3.3.7luminous environment 3.2.26luminous flux 3.2.1luminous flux, rated lamp 3.3.6luminous intensity 3.2.2
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luminous intensity distribution 3.3.13
maintained illuminance 3.2.15maintained luminance 3.2.7maintenance cycle 3.5.21maintenance factor 3.5.18maintenance factor, lamp lumen 3.3.16maintenance factor, luminaire 3.3.18
maintenance factor, room surface 3.5.19maintenance schedule 3.5.22maximum illuminance 3.2.14maximum luminance 3.2.6measurement field 3.6.6minimum illuminance 3.2.13minimum luminance 3.2.5
performance, visual 3.1.11photometer 3.6.1photometry 3.2.39
rated lamp luminous flux 3.3.6reference ballast 3.3.4reference lamp 3.3.5reference surface 3.2.22reflectance 3.2.36reflections, veiling 3.2.25reflectometer 3.6.5room surface maintenance factor 3.5.19
semi-cylindrical illuminance 3.2.20semi-direct lighting 3.5.8semi-indirect lighting 3.5.10skylight 3.4.6solar radiation 3.4.1spacing 3.5.4spacing to height ratio 3.5.5spherical illuminance 3.2.17spotlighting 3.5.15stroboscopic effect 3.5.16sunlight 3.4.5
transmittance 3.2.37tristimulus values 3.2.30
upward light output ratio 3.3.12utilance 3.3.15utilization factor 3.3.14
V() correction 3.6.7
veiling reflections 3.2.25visual acuity 3.1.3visual comfort 3.1.12visual field 3.1.10visual performance 3.1.11
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Annex C(informative)
A-deviation
A-Deviation: National deviation due to regulations, the alteration of which is for the time being outside thecompetence of the CEN/CENELEC member.
This European Standard does not fall under any Directive of the EC.
In the relevant CENELEC countries these A-deviations are valid instead of the provisions of theEuropean Standard until they have been removed.
Denmark
Danish Building Regulations BR 95 and BR S 98Published by the National Building and Housing Agency
Related to Clause 3 and 4
According to legal Danish Building Regulations BR 95 and BR S 98 the use of DS 700and DS 704 is mandatory.
DS 704 has a number of definitions in addition to those of clause 3.
DS 700 has UGR requirements in levels that are one unit higher than those of clause4.3.2.
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