Regulation No. 99-00

Name:Regulation No. 99-00
Description:Headlamps - Gas-discharge Lamps Sources.
Official Title:Uniform Provisions Concerning the Approval of: Gas-discharge Light Sources for Use in Approved Gas-discharge Lamp Units of Power-driven Vehicles.
Country:ECE - United Nations
Date of Issue:1996-03-25
Amendment Level:00 Series, Supplement 12
Number of Pages:66
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle
Subject Categories:Lighting and Light Signalling Equipment
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Keywords:

light, sheet, sources, gas-discharge, source, approval, regulation, arc, reference, test, type, category, position, annex, production, cap, objective, plane, voltage, ballast, form, axis, force, date, entry, relative, figure, characteristics, supplement, maximum, measuring, standard, direction, relevant, cross, data, minimum, dimensions, electrodes, section, luminance, flux, paragraph, luminous, requirements, lamp, amendments, tests, wattage, area

Text Extract:

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E/ECE/324
) Rev.1/Add.98/Rev.3/Amend.3
E/ECE/TRANS/505 )
July 26, 2017
STATUS OF UNITED NATIONS REGULATION
ECE 99-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
GAS-DISCHARGE LIGHT SOURCES FOR USE IN APPROVED
LAMPS OF POWER-DRIVEN VEHICLES
Incorporating:
00 series of amendments
Date of Entry into Force: 15.04.96
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 07.05.98
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 27.02.04
Corr. 1 of 13.05.04 to Supplement 1 to the 00 series of amendments
Date of Entry into Force: 10.03.04
Corr. 1 of 21.12.05 to Supplement 2 to the 00 series of amendments
Date of Entry into Force: 16.11.05
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 04.07.06
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 15.10.08
Corr. 1 of 15.01.09 to Revision 1 to the 00 series of amendments
Date of Entry into Force: 12.11.08
Supplement 5 to the 00 series of amendments
Date of Entry into Force: 19.08.10
Supplement 6 to the 00 series of amendments
Date of Entry into Force: 09.12.10
Supplement 7 to the 00 series of amendments
Date of Entry into Force: 26.07.12
Supplement 8 to the 00 series of amendments
Date of Entry into Force: 15.07.13
Supplement 9 to the 00 series of amendments
Date of Entry into Force: 10.06.14
Corr. 1 to Revision 3 of the Regulation
Dated: 04.03.15
Supplement 10 to the 00 series of amendments
Date of Entry into Force: 08.10.15
Supplement 11 to the 00 series of amendments
Date of Entry into Force: 18.06.16
Supplement 12 to the 00 series of amendments
Date of Entry into Force: 22.06.17

REGULATION NO. 99
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF GAS-DISCHARGE LIGHT SOURCES
FOR USE IN APPROVED LAMPS OF POWER-DRIVEN VEHICLES
CONTENTS
1. Scope
2. Administrative provisions
3. Technical requirements
4. Conformity of production
5. Penalties for non-conformity of production
6. Production definitively discontinued
7. Names and addresses of the Technical Services responsible for conducting approval tests,
and of Type Approval Authorities
ANNEXES
Annex 1 – Sheets for gas-discharge light sources
Annex 2 – Communication
Annex 3 – Example of the arrangement of the approval mark
Annex 4 – Method of measurement of electrical and photometric characteristics
Annex 5

Optical set-up for the measurement of the position and form of the arc and of the
position of the electrodes
Annex 6 – Minimum requirements for quality procedures by the manufacturer
Annex 7 – Sampling and compliance levels for manufacturer's test records
Annex 8 – Minimum requirements for sampling by an inspector

2.2.3. In the case of a type of gas-discharge light source differing only by the trade name or mark
from a type that has already been approved, it shall be sufficient to submit:
2.2.3.1. A declaration by the manufacturer that the type submitted is identical (except in the trade
name or mark) to and has been produced by the same manufacturer as, the type already
approved, the latter being identified by its approval code;
2.2.3.2. Two samples bearing the new trade name or mark.
2.2.4. The Type Approval Authority shall verify the existence of satisfactory arrangements for
ensuring effective control of the conformity of production before type approval is granted.
2.3. Inscriptions
2.3.1. Gas-discharge light sources submitted for approval shall bear on the cap or bulb:
2.3.1.1. The trade name or mark of the applicant;
2.3.1.2. The international designation of the relevant category;
2.3.1.3. The rated wattage; this need not be indicated separately if it is part of the international
designation of the relevant category;
2.3.1.4. A space of sufficient size to accommodate the approval mark.
2.3.2. The space mentioned in Paragraph 2.3.1.4. above shall be indicated in the drawings
accompanying the application for approval.
2.3.3. Other inscriptions than those covered by Paragraphs 2.3.1. above and 2.4.4. below may be
affixed on the cap.
2.3.4. In case the ballast is not integrated with the light source, the ballast used for the type
approval of the light source shall be marked with type and trade mark identification and with
the rated voltage and wattage, as indicated on the relevant gas-discharge light source
sheet.
2.4. Approval
2.4.1. If all samples of a type of gas-discharge light source which are submitted in accordance with
Paragraphs 2.2.2.3. or 2.2.3.2. above comply with the requirements of this Regulation, when
tested with the ballast according to Paragraph 2.2.2.4. in case the ballast is not integrated
with the light source, approval shall be granted.
2.4.2. An approval code shall be assigned to each type approved. Its first character shall indicate
the series of amendments incorporating the most recent major technical amendments made
to the Regulation at the time of issue of the approval.
This will be followed by an identification code comprising not more than three characters.
Only the Arabic numerals and capital letters listed in footnote shall be used.

3.3. Manufacture
3.3.1. The bulb of the gas-discharge light source shall exhibit no scores or spots which might
impair their efficiency and their optical performance.
3.3.2. In the case of a coloured (outer) bulb, after an operating period of 15h with the ballast or the
light source with the ballast integrated at test voltage, the surface of the bulb shall be lightly
wiped with a cotton cloth soaked in a mixture of 70% volume of n-heptane and 30% volume
of toluol. After about 5min, the surface shall be inspected visually. It shall not show any
apparent changes.
3.3.3. Gas-discharge light sources shall be equipped with standard caps, complying with the cap
data sheets of IEC Publication 60061, as specified on the individual data sheets of Annex 1
to this Regulation.
3.3.4. The cap shall be strong and firmly secured to the bulb.
3.3.5. To ascertain whether gas-discharge light sources conform to the requirements of
Paragraphs 3.3.3. to 3.3.4. above, a visual inspection, a dimension check and, where
appropriate, a trial fitting shall be carried out.
3.4. Tests
3.4.1. Gas-discharge light sources shall be aged as indicated in Annex 4 to this Regulation.
3.4.2. All samples shall be tested with the ballast, according to Paragraph 2.2.2.4. above, in case
the ballast is not integrated with the light source.
3.4.3. Electrical measurements shall be carried out with instruments of at least class 0.2. (0.2% full
scale accuracy)
3.5. Position and Dimensions of Electrodes, Arc and Stripes
3.5.1. The geometric position of the electrodes shall be as specified on the relevant data sheet. An
example of a method of measuring arc and electrodes position is given in Annex 5 to this
Regulation. Other methods may be used.
3.5.1.1. The position and dimensions of the light source electrodes shall be measured before the
ageing period, the gas-discharge light source unlit and using optical methods through the
glass envelope.
3.5.2. The shape and the displacement of the arc shall conform to the requirements as given on
the relevant data sheet.
3.5.2.1. The measurement shall be made after ageing with the light source supplied by the ballast at
test voltage or the light source with the ballast integrated at test voltage.
3.5.3. The position and dimension and transmission of the stripes shall comply with the
requirements as given on the relevant data sheet.
3.5.3.1. The measurement shall be made after ageing with the light source supplied by the ballast at
test voltage or the light source with the ballast integrated at test voltage.

3.8. Luminous Flux
When measured according to the conditions specified in Annex 4 to this Regulation, the
luminous flux shall be within the limits given on the relevant data sheet. In the case where
white and selective yellow is specified for the same type, the objective value applies to light
sources emitting white light, whereas the luminous flux of the light source emitting selective
yellow light shall be at least 68% of the specified value.
3.9. Colour
3.9.1. The colour of the light emitted shall be white or selective yellow. Moreover the colorimetric
characteristics, expressed in CIE chromaticity coordinates, shall lie within the boundaries
given on the relevant data sheet.
3.9.2. The definitions of the colour of the light emitted, given in Regulation No. 48 and its series of
amendments in force at the time of application for type approval shall apply to this
Regulation.
3.9.3. The colour shall be measured according to the conditions specified in Annex 4, to this
Regulation, Paragraph 10.
3.9.4. The minimum red content of a gas-discharge light source shall be such that:
k
=


E
E
( λ)
× v( λ)
× dλ
≥ 0.05
( λ)
× v( λ)
× dλ
where:
E (λ)
[W/nm]
is the spectral distribution of the radiant flux;
v (λ)
[1]
is the spectral luminous efficiency;
(λ)
[nm]
is the wave length.
This value shall be calculated using intervals of one nanometre.

4. CONFORMITY OF PRODUCTION
4.1. Gas-discharge light sources approved to this Regulation shall be so manufactured as to
conform to the type approved by meeting the inscriptions and technical requirements set
forth in Paragraph 3 above and Annexes 1 and 3 to this Regulation.
4.2. In order to verify that the requirements of Paragraph 4.1. are met, suitable controls of the
production shall be carried out.
4.3. The holder of the approval shall in particular:
4.3.1. ensure existence of procedures for the effective control of the quality of products,
4.3.2. Have access to the control equipment necessary for checking the conformity to each
approved type,
4.3.3. Ensure that data of test results are recorded and that related documents shall remain
available for a period to be determined in accordance with the administrative service,
4.3.4. Analyse the results of each type of test, applying criteria of Annex 7 to this Regulation, in
order to verify and ensure the stability of the product characteristics making allowance for
variation of an industrial production,
4.3.5. Ensure that for each type of gas-discharge light source, at least the tests prescribed in
Annex 6 to this Regulation are carried out,
4.3.6. Ensure that any collecting of samples giving evidence of non-conformity with the type of test
considered shall give rise to another sampling and another test. All the necessary steps
shall be taken to re-establish the conformity of the corresponding production.
4.4. The Type Approval Authority which has granted type-approval may at any time verify the
conformity control methods applicable to each production unit.
4.4.1. In every inspection, the test books and production survey records shall be presented to the
visiting inspector.
4.4.2. The inspector may take samples at random which will be tested in the manufacturer's
laboratory. The minimum number of samples may be determined according to the results of
the manufacturer's own verification.
4.4.3. When the quality level appears unsatisfactory or when it seems necessary to verify the
validity of the tests carried out in application of Paragraph 4.4.2. above, the inspector shall
select samples, to be sent to the Technical Service which has conducted the type approval
tests.
4.4.4. The Type Approval Authority may carry out any tests prescribed in this Regulation. These
tests will be on samples selected at random without causing distortion of the manufacturer's
delivery commitments and in accordance with criteria of Annex 8 to this Regulation.
4.4.5. The Type Approval Authority shall strive to obtain a frequency of inspection of once every
two years. However, this is at the discretion of the Type Approval Authority and their
confidence in the arrangements for ensuring effective control of the conformity of
production. In the case where negative results are recorded, the Type Approval Authority
shall ensure that all necessary steps are taken to re-establish the conformity of production
as rapidly as possible.

ANNEX 1
SHEETS FOR GAS-DISCHARGE LIGHT SOURCES
The sheets of the relevant gas-discharge light source category and the group in which this category is
listed with restrictions on the use of this category shall apply as incorporated in Resolution R.E.5 or its
subsequent revisions, applicable at the time of application for type approval of the gas-discharge light
source.

CATEGORIES D1R, D2R, D3R AND D4R
Sheet DxR/2
The drawings are intended only to illustrate the essential dimensions (in mm)
of the gas-discharge light source
Figure 3
Category D3R - Type with Starter – Cap PK32d-6
Figure 4
Category D4R - Type with Connector – Cap P32d-6

CATEGORIES D1R, D2R, D3R AND D4R
Sheet DxR/4
Dimensions
Position of electrodes
Position and form of the arc
Position of the black stripes
Production
light sources
Sheet DxR/5
Sheet DxR/6
Sheet DxR/7
Standard
light sources
α1 45° ± 5°
α2
D1R: Cap PK32d-3
D2R: Cap P32d-3
D3R: Cap PK32d-6
D4R: Cap P32d-6
45° minimum
in accordance with IEC Publication 60061 (sheet 7004-111-5)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
D1R/D2R
D3R/D4R
D1R/D2R
D3R/D4R
Rated voltage of the ballast
V
12
12
Rated wattage
W
35
35
Test voltage
V
13.5
13.5
Lamp voltage
Lamp wattage
Luminous flux
Chromaticity
co-ordinates in
the case of
white light
Objective
85 42 85 42
V
Tolerance ± 17 ± 9 ± 8 ± 4
Objective
35 35
W
Tolerance ± 3 ± 0.5
Objective
2800 2800
lm
Tolerance ± 450 ± 150
Objective x = 0.375 y = 0.375
Tolerance area
Boundaries
Intersection
points
x = 0.345
x = 0.405
x = 0.345
x = 0.405
x = 0.405
x = 0.345
y = 0.150 + 0.640 x
y = 0.050 + 0.750 x
y = 0.371
y = 0.409
y = 0.354
y = 0.309
Hot re-strike switch-off time s 10 10

CATEGORIES D1R, D2R, D3R AND D4R
Position and form of the arc
Sheet DxR/6
Page 1 out of 2
This test is used to determine the form and sharpness of the arc and its position relative to the reference
axis and plane by determining its bending and diffusion; by measuring the luminance in the central cross
section D, where Lmax is the maximum luminance of the arc measured from viewing Direction C; see
Sheet DxR/2.
Relative luminance distribution
in the central cross Section D.
The form of the arc is for
illustration purpose only.
Measuring direction C as defined
on sheet DxR/7.
When measuring the relative luminance distribution in the central cross section D as indicated in the
drawing above, the maximum value Lmax has the distance r from the reference axis. The points of 20%
of Lmax have the distance s, as shown in the drawing above.
Dimension in mm
Production light sources
D1R/D2R
D3R/D4R
Standard light sources
r (arc bending)
0.50 ± 0.25
0.50 ± 0.25
0.50 ± 0.20
s (arc diffusion)
1.10 ± 0.25
1.10 + 0.25/-0.40
1.10 ± 0.25

CATEGORIES D1R, D2R, D3R AND D4R
Sheet DxR/7
Position of black stripes
This test is used to determine whether the black stripes are correctly positioned relative to the
reference axis and the reference plane.
When measuring the luminance distribution of the arc in the central cross section as defined on
Sheet DxR/6, after having turned the light source so that the black stripe is covering the arc, the
measured luminance shall be ≤0.5% of Lmax.
In the area defined by α1 and α3 the black coating may be replaced by any other means which prevents
light transmission through the specified area.
Dimensions
Production light sources
Standard light sources
α1
45° ± 5°
α3
70° minimum
α4
65° minimum
β1/24, β1/30, β2/24, β2/30
25° ± 5°
f1/24, f2/24
0.15 ± 0.25
0.15 ± 0.20
f1/30
f1/24 mv ± 0.15
f1/24 mv ± 0.1
f2/30
f2/24 mv ± 0.15
f2/24 mv ± 0.1
f1/24 mv - f2/24 mv
± 0.3 max.
± 0.2 max.
d
9 ± 1

CATEGORIES D1S, D2S, D3S AND D4S
Sheet DxS/2
The drawings are intended only to illustrate the essential dimensions (in mm)
of the gas-discharge light source
Figure 3
Category D3S - Type with Starter - Cap PK32d-5
Figure 4
Category D4S - Type with Connector - Cap P32d-5

CATEGORIES D1S, D2S, D3S AND D4S
Sheet DxS/4
Position of electrodes
Dimensions
Position and form of the arc
Production
light sources
Sheet DxS/5
Sheet DxS/6
Standard
light sources
α1, α2
55° minimum
55° minimum
D1S: Cap PK32d-2
D2S: Cap P32d-2
D3S: Cap PK32d-5
in accordance with IEC Publication 60061 (sheet 7004-111-5)
D4S: Cap P32d-5
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
D1S/D2S D3S/D4S D1S/D2S D3S/D4S
Rated voltage of the ballast V 12 12
Rated wattage W 35 35
Test voltage V 13.5 13.5
Lamp voltage
Lamp wattage
Luminous flux
Chromaticity
co-ordinates in
the case of
white light
Objective
85 42 85 42
V
Tolerance ±17 ±9 ±8 ±4
Objective
35 35
W
Tolerance ±3 ±0.5
Objective
3,200 3,200
lm
Tolerance ±450 ±150
Objective
x = 0.375
y = 0.375
Boundaries
x = 0.345
y = 0.150 + 0.640 x
x = 0.405
y = 0.050 + 0.750 x
Tolerance area
x = 0.345
y = 0.371
Intersection x = 0.405
y = 0.409
points
x = 0.405
x = 0.345
y = 0.354
y = 0.309
Hot re-strike switch-off time s 10 10

CATEGORIESS D1S, D2S, D3S AND D4SD
Sheet DxS/6
Positionn and form of the arc
This test is used to determine the
form of thee arc and its position relative to the reference axis and the
reference plane by measuring its bending andd diffusion in
the cross section s at a distance 27. 1mm from
the reference plane.
When measuring the
relative luminance distribution in the central cross section as indicated in the
drawing above, the maximum value shall be located within the distance r from the referencee axis. The
point of 20% of the maximum value shall be within s.
Dimension in
mm
r (arc bending)
s (arc diffusion)
Production
light sourcess
0.50 ± 0.40
1.10 ± 0.40
Standard
light sources
0.500
± 0.20
1.10 ± 0.25

CATEGORY D5S
Sheet D5S/2
The cap shall be pushed in
this direction.
Figure 2
Definitionn of Reference Axis
Figure 3
Maximum Lamp Outline

CATEGORY D5S
Sheet D5S/4
Position of the electrodes
This test is used to determine whether the electrodes are
correctly positioned p relative to the reference
axis and the referencee plane.
Top view (schematic):
Side view (schematic):
Measuring direction: light source side and top view
Dimension
in mm
a1
a2
b1
b2
c
Production
light sources
0.30
0.50
0.30
0.60
3.90
Standard
light sources
0. 20
0. 25
0. 15
0. 30
3. 90
The arc attachment point to the electrode
nearest to the t reference plane shall be
positioned inn the area defined by a1
and
b1. The arc attachment point to
the
electrode furthest fromm the reference
plane shall be positioned in the area
defined by a2 a and b2.

CATEGORY D6S
Sheet D6S/1
The drawings are intended only to illustrate the essential dimensions (in mm) of the gas-discharge light
source
Figure 1
Category D6S – Cap P32d-1

CATEGORY D6S
Sheet D6S/3
Position of the electrodes
Dimensions
Position and form of the arc
Production
light sources
Sheet D6S/4
Sheet D6S/5
Standard
light sources
α1, α2 55° minimum 55° minimum
D6S: Cap P32d-1 in accordance with IEC Publication 60061 (sheet 7004-111-5)
Electrical and photometric characteristics
Rated voltage of the ballast V 12 12
Rated wattage W 25 25
Test voltage V 13.2 13.2
Objective lamp voltage V 42 ± 9 42 ± 4
Objective lamp wattage W 25± 3 25± 0.5
Objective Luminous flux lm 2,000 ± 300 2,000 ± 100
Chromaticity
coordinates
Objective x = 0.375 y = 0.375
Tolerance area
Boundaries
Intersection
points
x = 0.345
x = 0.405
y = 0.150 + 0.640 x
y = 0.050 + 0.750 x
x = 0.345 y = 0.371
x = 0.405 y = 0.409
x = 0.405 y = 0.354
x = 0.345 y = 0.309
Hot-restrike switch-off time s 10 10
α

CATEGORY D6S
Sheet D6S/5
Positionn and form of the arc
This test is used to determine the
form of thee arc and its position relative to the reference axis and the
reference plane by measuring its bending andd diffusion in
the cross section s at a distance 27. 1mm from
the reference plane.
Relativee luminance distribution in
the central cross section D.
The form of the arc is for
illustration purpose only.
Measuring direction:
lightt source side
view
When measuring the relative r luminance distribution in the central crosss section as
indicated in the drawing above, the maximumm value shall be locatedd within the
distance r from the reference axis. The point of
20% of the maximum value shall be
within s.
Dimension in mm
r (arc
bending)
s (arc
diffusion)
Production light sources
0.50 +/-0.25
0.70 +/-0.25
Standard S light sources
0.50 +/-0.15
0.70 +/-0.15

CATEGORY D8R
Sheet D8R/2
The cap shall be pushed in this direction
Figure 2
Definition of Reference Axis
Figure 3
Maximum Lamp Outline

CATEGORY D8R
Sheet D8R/4
This test is used to determine whether the electrodes are correctly positioned relative to the reference
axis and the reference plane.
Dimension in
mm
Production light
sources
Standard light
sources
a1 0.50 0.20
a2 0.70 0.35
b1 0.40 0.15
The arc attachment point to the electrode nearest
to the reference plane shall be positioned in the
area defined by a1 and b1. The arc attachment
point to the electrode furthest from the reference
plane shall be positioned in the area defined by
a2 and b2.
b2 0.80 0.30
c 3.90 3.90

CATEGORY D8R
Sheet D8R/6
Position of black stripes
This test is used to determine whether the black stripes are correctly positioned relative to the reference
axis and the reference plane.
When measuring the luminance distribution of the arc in the central cross section as defined on
Sheet D8R/5, after having turned the light source so that the black stripe is covering the arc, the
measured luminance shall be ≤ 0.5% of Lmax.
Dimensions Production light sources Standard light sources
α3
70° min.
α4
65° min.
β1/24, β 1/30, β 2/24, β 2/30
25° ± 5°
f1/24, f2/24
0 ± 0.25
0 ± 0.20
f1/30
f1/24 mv ± 0.15
f1/24 mv ± 0.1
f2/30
f2/24 mv ± 0.15
f2/24 mv ± 0.1
f1/24 mv - f2/24 mv
± 0.3 max.
± 0.2 max.
d
9 ± 1

CATEGORY D8S
Sheet D8S/2
The cap shall be pushed in this direction
Figure 2
Definitionn of Reference Axis
Figure 3
Maximum Lamp Outline

CATEGORY D8S
Sheet D8S/4
Position of the electrodes
This test is used to determine whether the electrodes are
correctly positioned p relative to the reference
axis and the referencee plane.
Top view (schematic):
Side view (schematic):
Measuring direction: light source side and top view
Dimension
in mm
a1
a2
b1
b2
c
Production
light sources
0.30
0.50
0.30
0.60
3.90
Standard
light sources
0. 20
0. 25
0. 15
0. 30
3. 90
The arc attachment point to the electrode
nearest to the t reference plane shall be
positioned inn the area defined by a1
and
b1. The arc attachment point to
the
electrode furthest fromm the reference
plane shall be positioned in the area
defined by a2 a and b2.

CATEGORY D9S
Sheet D9S/1
The drawings are intended only to illustrate the essential dimensions (in mm)
Figure 1
Category D9S - Cap PK32d-9

CATEGORY D9S
Sheet D9S/3
Dimensions
Position of the electrodes
Position and form of the arc
Production
light sources
Sheet D9S/4
Sheet D9S/5
Standard
light sources
α1, α2 55° minimum 55° minimum
D9S: Cap PK32d-9 in accordance with IEC Publication 60061 (sheet 7004-111-5)
Electrical and photometric characteristics
Rated voltage of the ballast V 12 12
Rated wattage W 27 35 27 35
Test voltage V 13.5 13.5
Objective lamp voltage V 34 ± 6 38 ± 8 34 ± 4 38 ± 4
Objective lamp wattage W 27 ± 3 35 ± 3 27 ± 0.5 35 ± 0.5
Objective Luminous flux lm 2,000 ± 300 3,000 ± 450 2,000 ± 100 3,000 ± 150
Chromaticity
coordinates
Objective x = 0.375 y = 0.375
Tolerance area
Boundaries
Intersection
points
x = 0.345
x = 0.405
y = 0.150 + 0.640 x
y = 0.050 + 0.750 x
x = 0.345 y = 0.371
x = 0.405 y = 0.409
x = 0.405 y = 0.354
x = 0.345 y = 0.309
Hot-restrike switch-off time s 10 10

CATEGORY D9S
Sheet D9S/5
Position and form of the arc
This test is used to determine the form of the arc and its position relative to the reference axis and the
reference plane by measuring its bending and diffusion in the cross section at a distance 27.1mm from
the reference plane.
Relative luminance distribution in
the central cross section D.
The form of the arc is for
illustration purpose only.
Measuring direction:
light source side view
When measuring the relative luminance distribution in the central cross section as
indicated in the drawing above, the maximum value shall be located within the
distance r from the reference axis. The point of 20% of the maximum value shall be
within s. The geometrical data is valid for 27W and 35W operation.
Dimension in mm Production light sources Standard light sources
r (arc bending) 0.35 +/-0.25 0.35 +/-0.15
s (arc diffusion) 0.80 +/-0.25 0.80 +/-0.15

11.
Place: ........................................................................................................................................
12.
Date: ..........................................................................................................................................
13.
Signature: ..................................................................................................................................
14.
The attached drawing No. . . . . . shows the entire light source.

ANNEX 4
METHOD OF MEASUREMENT OF ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
1. GENERAL
2. BALLAST
For starting, run-up and hot-restrike tests and for the measurement of electrical and
photometric characteristics, the gas-discharge light source shall be operated in free air with
an ambient temperature of 25° ± 5°C.
In the case the ballast is not integrated with the light source, all tests and measurements
shall be carried out with the ballast as per Paragraph 2.2.2.4. of this Regulation. The power
supply used for the starting and run-up tests shall be qualified to secure the quick rise of the
high current pulse.
3. BURNING POSITION
4. AGEING
The burning position shall be horizontal within ±10° with the lead wire down. Ageing and
testing positions shall be identical. If the gas-discharge light source is accidentally operated
in the wrong direction, it shall be re-aged before measurements begin. During ageing and
measurements no electrically conducting objects shall be allowed within a cylinder having a
diameter of 32mm and a length of 60mm concentric with the reference axis and symmetric
to the arc. Moreover stray magnetic fields shall be avoided.
All tests shall be carried out with light sources which have been aged for a minimum of
15 cycles having the following switching cycle:
45min on, 15s off, 5min on, 10min off.
5. SUPPLY VOLTAGE
All tests shall be carried out at test voltage as indicated on the relevant data sheet.
6. STARTING TEST
The starting test shall be applied to light sources which have not been aged and have not
been used for a period of at least 24h prior to the test.
7. RUN-UP TEST
The run-up test shall be applied to light sources which have not been used for a period of at
least 1h prior to the test.
8. HOT RESTRIKE TEST
The light source shall be started and be operated with the ballast (possibly integrated) at
test voltage for a period of 15min. Then the supply voltage to the ballast or the light source
with the ballast integrated shall be switched off for a switch-off period as indicated on the
relevant data sheet, and be switched on again.

ANNEX 5
OPTICAL SETUP FOR THE MEASUREMENT OF THE POSITION AND FORM OF
THE ARC AND OF THE POSITION OF THE ELECTRODES
The gas-discharge light source shall be positioned as shown in the main drawing of the respective
category.
An optical system shall project a real image A' of the arc A with a magnification of preferably
M = s'/s = 20 on a screen. The optical system shall be aplanatic and achromatic. In the focus-length f of
the optical system a diaphragm d shall cause a projection of the arc with nearly parallel observation
directions. To get the angle of the half divergence not larger than μ = 0.5°, the diameter of the
focus-diaphragm with respect to the focus-length of the optical system shall be not more than
d = 2f tan(μ). The active diameter of the optical system shall be not more than:
D = (1 + 1/M)d + c + (b1 + b2)/2. (c, b1 and b2 are given in the sheets prescribing the position of the
electrodes).
A scale on the screen shall enable to measure the position of the electrodes. The calibration of the
arrangement advantageously can be done by using a separate projector with a parallel beam in
connection with a gauge whose shadow is projected to the screen. The gauge shall show the reference
axis and the plane parallel to the reference plane and at distance "e" mm from it.
In the plane of the screen a receiver has to be mounted movable in a vertical direction on a line
corresponding to the plane at "e" from the reference plane of the gas discharge light source.
The receiver shall have the relative spectral sensitivity of the human eye. The size of the receiver shall
be not more than 0.2Mmm in the horizontal and not more than 0.025Mmm in the vertical direction
(M = the magnification). The range of measurable movement shall be such that the required measures of
the arc bending r and arc diffusion s can be measured. For the measurement of the stray light, the size of
the receiver shall be circular with a diameter of 0.2Mmm diameter.

2.5. Criteria Governing Acceptability
The manufacturer or the holder of approval is responsible for carrying out a statistical study
of the test results in order to meet the specification laid down for verification of conformity of
products in Paragraph 4.1. of this Regulation.
Compliance shall be assured if the level of acceptable non-compliance per grouping of
characteristics given in Table 1 of Annex 7 to this Regulation is not exceeded. This means
that the number of gas-discharge light sources not complying with the requirement for any
grouping of characteristics of any gas-discharge light source type does not exceed the
qualifying limits in the relevant Tables 2, 3 or 4 of Annex 7 to this Regulation.
Note: Each individual gas-discharge light source requirement shall be considered as a
characteristic.

Qualifying limits for acceptance based on different numbers of test results for each grouping of
characteristics are listed in Table 2 as maximum number of non-compliances. The limits are based on an
acceptable level of 1% of non-compliances, assuming an acceptance probability of at least 0.95.
Table 2
Number of test results of
each characteristic

200
201 −
260
261 −
315
316 −
370
371 −
435
436 −
500
501 −
570
571 −
645
646 −
720
721 −
800
801 −
860
861 −
920
921 −
990
991 − 1,060
1,061 − 1,125
1,126 − 1,190
1,191 − 1,249
Qualifying limits for acceptance
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

Qualifying limits for acceptance based on different numbers of test results for each grouping of
characteristics are listed in Table 4 given as a percentage of the results, assuming an acceptance
probability of at least 0.95.
Table 4
Number of test
results of each
characteristic
1,250
2,000
4,000
6,000
8,000
10,000
20,000
40,000
80,000
100,000
1,000,000
Qualifying limits shown
as a percentage of results.
Acceptable level of 1%
of non-compliances
1.68
1.52
1.37
1.30
1.26
1.23
1.16
1.12
1.09
1.08
1.02
Qualifying limits shown
as a percentage of results.
Acceptable level of 6.5%
of non-compliances
7.91
7.61
7.29
7.15
7.06
7.00
6.85
6.75
6.68
6.65
6.55

Headlamps - Gas-discharge Lamps Sources.