© ISO 2015 Cycles — Lighting and retro reflective devices — Part 1 Lighting and light signalling devices Cycles — Éclairage et dispositifs rétro réfléchissants — Partie 1 Équipements de signalisation[.]
INTERNATIONAL STANDARD ISO 6742-1 Third edition 2015-05-15 Cycles — Lighting and retroreflective devices — Part 1: Lighting and light signalling devices Cycles — Éclairage et dispositifs rétro-réfléchissants — Partie 1: Équipements de signalisation et d’éclairage Reference number ISO 6742-1:2015(E) © ISO 2015 ISO 6742-1:2015(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2015, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2015 – All rights reserved ISO 6742-1:2015(E) Contents Page Foreword iv Scope Normative re ferences Terms and definitions Photometrical requirements 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 General Front position lamp 4.2.1 Photometric requirements 4.2.2 Mode of illumination Rear lamp 4.3.1 Photometric requirements 4.3.2 Mode of illumination Stop lamp 4.4.1 Photometric requirements 4.4.2 Mode of illumination Low beam 4.5.1 Photometric requirements 4.5.2 Mode of illumination High beam 4.6.1 Photometric requirements 4.6.2 Mode of illumination 4.6.3 Additional requirements Direction indicators 10 4.7.1 Photometric requirements 10 4.7.2 Mode of illumination 11 Stand light 11 4.8.1 Photometric requirements 11 4.8.2 Mode of illumination 12 Colour requirements 12 Test methods 12 6.1 General 12 f 13 6.3 Installation on test bench 13 Annex A (informative) Measurement o f flashing light 14 Annex B (normative) Colour o f the light emitted 16 6.2 Po wer s up p ly and light s o urce to tes t p ho to metrical p er o rmances Bibliography 18 © ISO 2015 – All rights reserved iii ISO 6742-1:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso.org/directives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword — Supplementary in formation The committee responsible for this document is ISO/TC 149, Cycles, SC 1, Cycles and major sub-assemblies This third edition cancels and replaces the second edition (ISO 6742-1:1987), which has been technically revised ISO 6742 consists of the following parts, under the general title Cycles — Lighting and retro-reflective devices: — Part 1: Lighting and light signalling devices — Part 2: Retro-reflective devices — Part 3: Installation and use of lighting and retro-reflective devices — Part 4: Lighting systems powered by the cycle’s movement — Part 5: Lighting systems not powered by the cycle’s movement iv © ISO 2015 – All rights reserved INTERNATIONAL STANDARD ISO 6742-1:2015(E) Cycles — Lighting and retro-reflective devices — Part 1: Lighting and light signalling devices Scope T h i s p a r t o f the I S O 6742 i s appl ic able to l ighti ng device s u s e d on c ycle s i ntende d to b e u s e d on publ ic ro ad s and , e s p e ci a l ly, bic ycle s complyi ng with I S O 42 10 a nd I S O T h i s p ar t o f I S O 6742 s p e c i fie s the fu nc tion s , s a fe ty re qui rements , tome tric p er forma nce and te s t me tho d s o f l ighti ng a nd s igna l l i ng devices that c a n b e u s e d on c ycle s T he Normative re ferences fol lowi ng i nd i s p en s able c uments , i n whole or i n p ar t, a re normatively re ference d i n th i s c u ment and a re for its appl ic ation For date d re ference s , on ly the e d ition cite d appl ie s For u ndate d re ference s , the late s t e d ition o f the re ference d c u ment (i nclud i ng any amend ments) appl ie s ISO 6742-4:2015, Cycles — Lighting and retro-reflective devices — Part 4: Lighting systems powered by the cycle’s movement ISO 6742-5:2015, Cycles — Lighting and retro-reflective devices — Part 5: Lighting systems not powered by the cycle’s movement CIE 1931, XYZ colour space of the International Commission on Illumination Terms and definitions For the pu r p o s e s o f th i s c ument, the fol lowi ng term s and defi n ition s apply 3.1 front position lamp lamp em itti ng a wh ite or an a mb er l ight to the front o f the c ycle, s o as to i nd ic ate its pre s ence on the ro ad 3.2 headlamp lamp to l ight the ro ad to the front o f the c ycle th at s either low b e a m, h igh b e am or b o th 3.3 rear lamp lamp em itti ng a re d l ight to the re ar o f the c ycle and u s e d to i nd ic ate its pre s ence on the ro ad 3.4 stop-lamp lamp u s e d to i nd ic ate to o ther ro ad u s ers th at the c ycle bra ke s or s ign i fic antly de celerate s 3.5 low beam l i ght th at i l lu m i n ate s opposite direction the © ISO 2015 – All rights reserved ro ad i n fro nt o f the c yc le w i tho ut d a z z l i n g o the r ro ad u s e r s fro m the ISO 6742-1:2015(E) 3.6 high beam light that illuminates the road for a long distance ahead of the vehicle 3.7 direction indicators lamp s u s e d to i nd icate to o ther ro ad u s ers that the c ycl i s t i ntend s to cha nge d i re c tion to the right or le ft 3.8 stand-light l ight em itte d b y a lamp for a ti me a fter the c ycle h as s topp e d 3.9 lamp equipped with replaceable light source lamp who s e light s ource(s) can b e replaced by the us er with an e quivalent light s ource(s) o f the s ame typ e 3.10 lamp equipped with non-replaceable light source lamp who s e l ight s ou rce(s) i s p ermanently fitte d, and no t de s igne d to b e replace d b y the u s er 3.11 cycles any veh icle that s at le as t two whe el s and i s prop el le d s olely or mai n ly b y the mu s c u lar energ y o f the p ers on on that veh icle, i n p ar tic u la r b y me an s o f p e da l s 3.12 re ference axis cha rac teri s tic hori z onta l a xi s o f the la mp, a s de term i ne d b y the ma nu fac turer or b y the d i re c tion l ight i s em itte d with gre ate s t i nten s ity, to s er ve as a d i re c tion o f re ference duri ng u s e i n s er vice and du ri ng test measurements 3.13 plane HH horizontal plane parallel to the ground passing through the reference axis 3.14 plane VV vertical plane through the reference axis 3.15 public road any de s igne d and adop te d ro ad p avement, p ath or track on wh ich a bic ycle p erm itte d to travel a nd on mo s t th rough no t a l l s uch publ ic ro ad s , bic ycle s wi l l sha re u s e with o ther form s o f tran s p or t i nclud i ng mo tori s e d tra ffic 3.16 short pulse l ight fla sh shor ter th an , s Photometrical requirements 4.1 General I f the re ference a xi s i s no t mentione d by manu fac tu rer, th i s d i re c tion s l l b e de term i ne d b y that i n wh ich l ight i s em itte d with gre ate s t i nten s ity With i n the field o f l ight d i s tribution, s chematic a l ly shown as a grid, the l ight i nten s ity i n e ach d i re c tion o f a p ar t o f the fielde d forme d by the grid l i ne s me e ts at le a s t the lowe s t m i n i mu m p ercentage va lue being shown on the grid lines surrounding the questioned direction © ISO 2015 – All rights reserved ISO 6742-1:2015(E) 4.2 Front position lamp 4.2.1 Photometric requirements The requirements of the front position lamp contained below in Table shall correspond to the illustrative dimensions as shown further below in Figure Table — Light distribution for front position lamp Position In area bound by straight lines connecting dots E, C, B, B’, C’, E’ and E From E to F and E’ to F’ In rectangular area bounded by lines 15°U, 15°D, 80°L and 80°R Upper limit on the H-H line and above H-H line Key H V U and D L and R Value in cd ≥4 ≥2 ≥0,05 140 max represents the horizontal plane to the ground through the reference axis represents the vertical plane through the reference axis represent the degrees o f arc, respectively, above and below the horizontal plane represent the degrees o f arc, respectively, to the le ft and right o f the vertical plane Figure — Measuring and aiming screen for front position lamp 4.2.2 Mode o f illumination A front position lamp could either emit a continuous light or flash at a frequency from Hz to Hz Such a lamp may be capable o f only one mode or be switched between modes NOTE Some national or regional regulations not permit the use o f flashing lights on pedal cycles, apart from direction indicators © ISO 2015 – All rights reserved ISO 6742-1:2015(E) 4.3 Rear lamp 4.3.1 Photometric requirements The requirements of the rear lamp contained in Table shall correspond to the illustrative dimensions as shown further below in Figure Rear lamps with a function of the stand light shall correspond with the requirement of 4.8 Table — Light distribution for rear lamp Position Value in cd A on intersection of horizontal plane and vertical plane ≥ 2,5 ≥1 ≥ 0,33 ≥ 0,1 ≥ 0,033 In rectangular area bounded by lines 5°U, 5°D, 5°L and 5°R In rectangular area bounded by lines 10°U, 10°D, 10°L and 10°R In rectangular area bounded by lines 10°U, 10°D, 45°L and 45°R In rectangular area bounded by lines 10°U, 10°D, 110°L and 110°R Upper limit on the H-H line and above H-H line Key H V U and D L and R 12 max represents the horizontal plane to the ground through the reference axis represents the vertical plane through the reference axis represent the degrees o f arc, respectively, above and below the horizontal plane represent the degrees o f arc, respectively, to the le ft and right o f the vertical plane Figure — Measuring and aiming screen for rear lamp 4.3.2 Mode o f illumination A rear lamp could either emit a continuous light or flash at a frequency from Hz to Hz Such a lamp may be capable o f only one mode or be switched between modes NOTE Some national or regional regulations not permit the use o f flashing lights on pedal cycles, apart from direction indicators © ISO 2015 – All rights reserved ISO 6742-1:2015(E) 4.4 Stop lamp 4.4.1 Photometric requirements T he m i n i mu m i nten s ity me as u re d on the re ference a xi s at p oi nt H = V = ° o f a s top lamp sha l l b e the highest of the following two values, as appropriate: — 40 cd min; — where a s top lamp fu nc tion i s provide d b y a re ar la mp , at le as t five ti me s the gre ate s t me as u rable i nten s ity o f the re ar lamp T he gre ate s t me a s urable i nten s ity o f the s top lamp s l l no t e xce e d cd Light s l l b e em itte d from a s top l amp th roughout a z one defi ne d as fol lows with res p e c t to d i re c tion p oi nt H = V = °: ± 45 ° hori z onta l ly and ±1 ° ver tic a l ly T h roughout the field o f em i s s ion the i nten s ity shall not be less than 0,3 cd T he i nten s ity i n s p e c i fie d d i re c tion s with i n the grid accord i ng to Figure sha l l b e no t les s tha n s p e ci fie d p ercentage s o f the m i n i mum p oi nt H = V = ° i nten s ity T he a ngle s a nd p ercentage s relative to the p oi nt H = V = ° d i re c tion and va lue (10 %) are s p e ci fie d i n © ISO 2015 – All rights reserved Figure ISO 6742-1:2015(E) Key H V U and D L and R represents the horizontal plane to the ground through the reference axis represents the vertical plane through the reference axis represent the degrees o f arc, respectively, above and below the horizontal plane represent the degrees o f arc, respectively, to the le ft and right o f the vertical plane Figure — Light distribution for stop lamp 4.4.2 Mode o f illumination A stop lamp (while stopping) shall emit light continuously The stop lamp shall be operated either by electrical switches incorporated within or attached to the bicycles braking system or systems, or shall incorporate a device that operates the stop lamp when the bicycle decelerates more rapidly than (0,6 ± 0,4) m/s 4.5 Low beam 4.5.1 Photometric requirements The requirements of the low beam contained in Table shall correspond to the illustrative dimensions as shown further in Figure © ISO 2015 – All rights reserved ISO 6742-1:2015(E) Table — Light distribution for low beam Position On the H-H line and above H-H line A From CL to CR Vertical line between A to B (included) From B to M From FL to FR From GL to FL and from FR to GR Illumination values in lux abc ≤ lx E Ac ≥ 10 lx E ≥ EA / If E A ≤ 20 lx, E shall be ≥ E max/2 If E A > 20 lx, E shall be ≥ 10 lx If E A ≤ 20, E shall be above 1,5 lx If E A > 20, E shall be above lx If E A ≤ 20, E shall be above lx If E A > 20, E shall be above lx If E A ≤ 20, no requirement If E A > 20, E shall be above lx E shall be ≤ 1,2 E A Area between line ° down and ° down And between vertical lines at ° le ft and right Area below line ° down and between vertical lines at E shall be ≤ E A ° le ft and right a Values in lux measured on a vertical wall at 10 m ahead from headlamp b To make measurements, the bicycle light shall be fit in accordance with bicycle light manu facturer I f mounting instruction are not clearly defined, there are two possible alternatives: — H-H line is the line where the illumination is just lx — H-H line is the line 3,5 ° above the line including E max (E max is the maximum illumination) c E A is the illumination in point A © ISO 2015 – All rights reserved ISO 6742-1:2015(E) Key A CR/CL B M FL/FR GL/GR H-H V-V D L and R point on the line V-V, 3,5 ° below the line H-H points on a horizontal line 3,5 ° below the line H-H, ° le ft and right point ° below H-H on the line V-V point 8,5 ° below H-H on the line V-V points on a horizontal line 8,5 ° below the line H-H, ° le ft and right points on a horizontal line 8,5 ° below the line H-H, ° le ft and right horizontal line at vertical ° vertical line at horizontal ° represent the degrees o f arc, respectively, below the horizontal plane represent the degrees o f arc, respectively, to the le ft and right o f the vertical plane Figure — Measuring and aiming screen for low beam 4.5.2 Mode o f illumination A headlamp that provides a low beam shall emit light continuously 4.6 High beam 4.6.1 Photometric requirements The requirements of the high beam contained in Table shall correspond to the illustrative dimensions as shown further in Figure © ISO 2015 – All rights reserved ISO 6742-1:2015(E) Table — Light distribution for high beam HV E HV a Key H-H line V-V line A1 / A2 A3 D L and R ≥ 50 lx a A1 E A1 ≥ E A2 E A2 HV/2 ≥ E HV/2 A3 E A3 ≥ 10 l x Values in lux measured on a vertical wall at 10 m ahead from headlamp a horizontal plane, parallel to the ground vertical p lane p as s ing thro ugh b icycle o n line H - H at 4° le ft and right o n line V-V at , ° down b elow H - H rep res ent the degrees o f arc, res p ectively, b elo w the ho rizo ntal p lane rep res ent the degrees o f arc, res p ectively, to the le ft and right o f the vertical p lane Figure — Measuring and aiming screen for high beam 4.6.2 Mode o f illumination He ad la mp s l l em it l ight conti nuou sly 4.6.3 Additional requirements T he lamp shal l b e equipp ed with a device which ens u res that the us er can mo di fy the light di s tribution from high b eam to low b eam and vice vers a with j us t one movement s o that it meets the relevant requirements An appropriate triggering mechanism/device f f If the light source of the low beam lamp is different from the light source of the high beam lamp but incorporated into the same casing, the point HV of both light sources must be identical can b e i ns tal led sep arately © ISO 2015 – All rights reserved rom the lamp itsel ISO 6742-1:2015(E) 4.7 Direction indicators 4.7.1 Photometric requirements Light sh a l l b e em itte d th roughout a zone defi ne d as (for exa mple to the right be from for fol lows with re s p e c t to d i re c tion H V: ° outward s a right-ha nd i nd ic ator) and ° i nward s T he ver tic a l field sh a l l genera l ly +1 ° (upwa rd s) to −1 ° (downwa rd s) T he i nten s ity me a s ure d on the re ference a xi s o f a minimum values of Table Table front or re ar d i re c tion i nd ic ator s l l b e at le a s t the T he gre ates t me a s urable i nten s ity s l l no t e xce e d the M a xi mum va lue i n T h roughout the field o f em i s s ion the i nten s ity s l l no t b e le s s than , cd Table — Intensities in candela Front indicator Rear indicator Minimum 50 50 Maximum 350 350 T he i nten s ity i n s p e ci fie d d i re c tion s with i n the me as u rement grid s l l b e no t le s s th an s p e ci fie d percentages in Figure o f the m i n i mu m i nten s ity T he a ngles a nd p ercentage s relative to the re ference a xi s (10 %) are s p e c i fie d i n 10 Figure © ISO 2015 – All rights reserved ISO 6742-1:2015(E) Key H represents the horizontal plane to the ground through the reference axis V represents the vertical plane through the reference axis U and D represent the degrees o f arc, respectively, above and below the horizontal plane L and R represent the degrees o f arc, respectively, to the left and right o f the vertical plane Figure — Light distribution for direction indicator 4.7.2 Mode o f illumination The lights shall flash at frequency from Hz to Hz with a duty cycle o f 45 % to 55 % The intensity during the on-cycle shall be visually constant 4.8 Stand light 4.8.1 Photometric requirements This requirement applies to the rear lamp with a function of the stand light When tested according to Clause , the luminous intensity, measured on point A (see Figure 2), at the commencement of the test the luminous intensity o f the light shall not be lower than 200 mcd and shall fulfil the following values: — after at least 140 mcd; — after at least 100 mcd; — after at least 70 mcd; © ISO 2015 – All rights reserved 11 ISO 6742-1:2015(E) — after at least 50 mcd 4.8.2 Mode o f illumination A stand light could either emit a continuous light or flash at a frequency from Hz to Hz Such a lamp may be capable o f only one mode or be switched between modes NOTE Some national or regional regulations not permit the use o f flashing lights on pedal cycles, apart from direction indicators Colour requirements The colour shall be according to Table Table — Colour requirements Function Front position lamp Rear lamp Stop lamp Low beam High beam Direction indicator Colour White or Amber Red Red White White Amber Trichromatic coordinates See Annex B Test methods 6.1 General During photometric measurements, stray reflections shall be prevented by appropriate masking In all cases, the distance of measurements shall be such that the law of the inverse of the square of the distance is applicable For all values expressed in lux, the measurements are per formed on a vertical screen P fitted 10 m in front of the lamp If the distance of measurement is different than 10 m, the result of measurements shall be expressed at 10 m following the law of the inverse of the square of the distance The measuring equipment shall be such that the angular aperture of the receiver viewed from the reference centre of the lamp is between 10’ and 1° The intensity requirement for a particular direction o f observation shall be deemed to be satisfied i f that requirement is met in a direction deviating by not more than 15’ from the direction o f observation For any lamps, except those equipped with filament lamps, the luminous intensities and colour measured a fter and a fter 30 o f operation shall comply with the requirements The luminous intensity distribution a fter one minute o f operation can be calculated from the luminous intensity distribution a fter 30 o f operation by applying at each test point the ratio o f luminous intensities measured at H = V = ° a fter and a fter 30 o f operation In case o f short pulses, the e ffective intensity o f flashing light shall be measured according to Annex A I f a lamp has flashing and continuous modes provided by the same light source(s), its per formance shall be measured mainly in continuous mode The intensity in flashing mode shall be measured only in re ference axis, with flashing intensities in other directions calculated in proportion to the continuous intensity in those directions compared to re ference axis The LED colour shall be measured according to test method described in CIE 1931 12 © ISO 2015 – All rights reserved ISO 6742-1:2015(E) 6.2 Power supply and light source to test photometrical performances The lamp shall be equipped with the light sources specified by the manu facturer and operated at its reference luminous flux, for the voltage specified by the manu facturer according to ISO 6742-4 and ISO 6742-5 For lighting devices working with power supplied by cycle’s movement defined in ISO 6742-4, Clause 4, it’s possible to use DC or AC power supply as described below: a) Lighting devices with LED Test voltage V ; the current shall not exceed: 1) f or 2,4 W headlamps (for W / 2,4 W – systems): 440 mA; 2) f 3) f 4) f or 1,2 W headlamps (for 1,5 W – system): 220 mA; or 0,6 W rear lamps (for W – system): 110 mA; or 0,3 W rear lamps (for 1,5 W – system): 55 mA Alternatively the devices can be measured with test current: 1) f or 2,4 W headlamps (for W / 2,4 W systems): 400 mA; 2) f 3) f 4) f or 1,2 W headlamps (for 1,5 W – system): 200 mA; or 0,6 W rear lamps (for W – system): 100 mA; or 0,3 W rear lamps (for 1,5 W – system): 50 mA The voltage shall not exceed 6,7 V b) Lighting devices with filament bulbs 1) changeable filament lamp: luminous flux according to lamp data sheet; 2) non-changeable lamp: V 6.3 Installation on test bench The lamp shall be installed on the test bench according to the recommendations o f the cycle manu facturer or, those of the constructor of the lamp During the measurements the light shall be fit in accordance with the manu facturer I f this is not clearly defined in the instruction manual there are two possibilities: — H-H is the line where the illumination on this line and above is not higher than lx; — H-H is the line 3,5 ° above E max NOTE Values in lux measured on a vertical wall at 10 m ahead from headlamp © ISO 2015 – All rights reserved 13 ISO 6742 -1 : 01 (E) Annex A (informative) Measurement o f flashing light A.1 General This function o f flashing light is only allowed for front position lamp, rear lamp and stand light The frequency o f flashing shall be higher than Hz, the luminous intensity shall be measured according to the following test method The following methods for evaluating the characteristics o f flashing lights are derived from UN/ECE Regulation No 65 [[3]] A.2 E ffective intensity The e ffective intensity ( J eff measured in candela) o f a flashing light is given by the Formula (A.1): J eff = where J max (A.1) + F ⋅T C J max is peak intensity, expressed in candela; T is duration o f flash, expressed in seconds; C is time constant, expressed in seconds (= 0,2 s); F is form factor The form factor ( F ) is given by the Formula (A.2): F = where J ∫ T J J ⋅ dt (A.2) max ⋅ T is instantaneous intensity, expressed in candela When intensity ( J ) is charted against time ( t ), F is the area under the curve expressed as a fraction of the bounding rectangle, e.g F equals for square wave, 0,637 for a half sine wave, or 0,5 for a triangular spike NOTE A.3 Grouped flashes I f the emitted light consists o f groups o f two or more closely consecutive flashes, any group o f flashes shall be evaluated as one flash depending upon the relationship between three factors: — the ratio o f peak intensity between the brightest ( J h ) and least bright ( J l ) flash in the group; 14 © ISO 2015 – All rights reserved ISO 6742 -1 : 01 (E) — the overa l l flas h fre quenc y ( f ) , i e the nu mb er o f flas h group s p er s e cond as s u m i ng a l l prob ab le group s may b e re garde d as s uch; — the time interval ( Tg If the peak to peak interval ( Tg ) b e twe en s e c utive fl as he s i n the group ) i s le s s than or e qua l to , s , then the pu l s e s are a lways eva luate d a s one flas h I f gre ater, re fer to the Table A.1 below Table A.1 — Limiting value o f Tg Jh Jl Limiting value of Tg Between and 10 Greater than 10 J f , 50 − , 25 J h l 3f If Tg exceeds a value calculated from the appropriate formula in the above Table A.1 , on ly the fla sh with the h ighe s t p e a k i nten s ity sha l l b e eva luate d and any adj acent p e a k s l l b e rega rde d a s a s ep arate fla sh A.4 On-time and o ff-time T he on-ti me i s defi ne d a s the p erio d o f ti me with i n wh ich the lu m i nou s i nten s ity o f the fl as h i ng l ight i s greater than 1/10th of the peak value ( J max ) T he o ff-ti me i s defi ne d a s the p erio d o f ti me with i n wh ich the lu m i nou s i nten s ity o f the fla sh i ng l ight i s less than 1/100th of the of the peak value ( J max ) or less than 10 cd, whichever is the smaller © ISO 2015 – All rights reserved 15 ISO 6742-1:2015(E) Annex B (normative) Colour o f the light emitted Table B.1 gives the colour of light Table B.1 — x-y chromaticity coordinates o f the intersection points o f colour boundary lines Colour Red Amber White Key W A R S x y x y x y 0,665 0,335 0,547 0,452 0,300 0,342 0,645 0,335 0,536 0,444 0,440 0,432 Coordinates 0,721 0,259 0,613 0,387 0,500 0,440 0,735 0,265 0,593 0,387 0,500 0,382 0,440 0,382 0,300 0,276 white light region amber light region red light region spectrum locus Figure B.1 — Boundaries o f colour areas for lighting and light signalling devices 16 © ISO 2015 – All rights reserved