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 11
Number of Pages:68
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle
Subject Categories:Lighting and Light Signalling Equipment
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Keywords:

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

Text Extract:

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E/ECE/324
) Rev.1/Add.98/Rev.3/Amend.2
E/ECE/TRANS/505 )
July 11, 2016
STATUS OF UNITED NATIONS REGULATION
ECE 99-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
GAS-DISCHARGE LIGHT SOURCES FOR USE IN APPROVED
GAS-DISCHARGE LAMP UNITS 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

REGULATION NO. 99
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF GAS-DISCHARGE LIGHT SOURCES
FOR USE IN APPROVED GAS-DISCHARGE LAMP UNITS 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 lamp data 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.

3.1.5. "Test voltage": Voltage at the input terminals of the ballast or at the terminals of the light
source in the case that the ballast is integrated with the light source, for which the electrical
and photometric characteristics of the gas-discharge light source are intended and are to be
tested.
3.1.6. "Objective value": Design value of an electrical or photometric characteristic. To be
achieved, within the specified tolerances, when the gas-discharge light source is energised
by the ballast, optionally integrated with the light source, and operated at test voltage.
3.1.7. "Standard (etalon) gas-discharge light source": Special gas-discharge light source used
for the testing of headlamps. It has reduced dimensional, electrical and photometric
characteristics as specified on the relevant data sheet.
3.1.8. "Reference axis": An axis defined with reference to the cap and to which certain
dimensions of the gas-discharge light source are referred.
3.1.9. "Reference plane": A plane defined with reference to the cap and to which certain
dimensions of the gas-discharge light source are referred.
3.2. General Specifications
3.2.1. Each sample submitted shall conform to the relevant specifications of this Regulation when
tested, in the case the ballast is not integrated with the light source with the ballast
according to Paragraph 2.2.2.4. above.
3.2.2. Gas-discharge light sources shall be so designed as to be and to remain in good working
order when in normal use. They shall moreover exhibit no fault in design or manufacture.
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, third edition, 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.

3.6.2. Run-Up
3.6.2.1. For gas-discharge light sources having an objective luminous flux which exceeds 2,000lm:
When measured according to the conditions specified in Annex 4, the gas-discharge light
source shall emit at least:
After 1s : 25% of its objective luminous flux;
After 4s: 80% of its objective luminous flux.
The objective luminous flux as indicated on the relevant data sheet.
3.6.2.2. For gas-discharge light sources having an objective luminous flux which does not exceed
2,000lm and does not contain black stripes:
When measured according to the conditions specified in Annex 4, the gas-discharge light
sources shall emit at least 800lm after 1s and at least 1,000lm after 4s.
The objective luminous flux as indicated on the relevant data sheet.
For gas-discharge light sources having an objective luminous flux which does not exceed
2,000 lm but does contain black stripes:
When measured according to the conditions specified in Annex 4, the gas-discharge light
sources shall emit at least 700lm after 1s and at least 900 lm after 4s.
3.6.3. Hot-Restrike
The objective luminous flux as indicated on the relevant data sheet.
When tested according to the conditions specified in Annex 4 to this Regulation, the
gas-discharge light source shall restart directly after being switched-off for a period, as
indicated on the data sheet. After 1s the light source shall emit at least 80% of its objective
luminous flux.
3.7. Electrical Characteristics
When measured according to the conditions specified in Annex 4 to this Regulation, the
voltage and wattage of the light source shall be within the limits given on the relevant data
sheet.
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.

The UV-radiation shall be weighted according to the values as indicated in the following
table:
λ S(λ) λ S(λ) λ S(λ)
250 0.430 305 0.060 355 0.00016
255 0.520 310 0.015 360 0.00013
260 0.650 315 0.003 365 0.00011
265 0.810 320 0.001 370 0.000090
270 1.000 325 0.00050 375 0.000077
275 0.960 330 0.00041 380 0.000064
280 0.880 335 0.00034 385 0.000053
285 0.770 340 0.00028 390 0.000044
290 0.640 345 0.00024 395 0.000036
295 0.540 350 0.00020 400 0.000030
300 0.300
Wavelengths chosen are representative; other values should be interpolated.
Values according to "IRPA/INIRC Guidelines on limits of exposure to ultraviolet radiation".
3.11. Standard Gas-Discharge Light Sources
Standard (etalon) gas-discharge light sources shall comply with the requirements applicable
to type approval light sources and to the specific requirements as stated in the relevant data
sheet. In case of a type emitting white and selective yellow light, the standard light source
shall emit white light.
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,

6. PRODUCTION DEFINITIVELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a type of gas-discharge light
source approved in accordance with this Regulation, he shall so inform the authority which
had granted the approval. Upon receiving the relevant communication, that authority shall
inform thereof the other Parties to the Agreement applying this Regulation by means of a
communication form conforming to the model in Annex 2 to this Regulation.
7. NAMES AND ADDRESSES OF THE TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF TYPE APPROVAL AUTHORITIES
The Contracting Parties to the Agreement which apply this Regulation shall communicate to
the United Nations Secretariat the names and addresses of the Technical Services
responsible for conducting approval tests and of the Type Approval Authorities which grant
approval and to which forms certifying approval or extension or refusal or withdrawal of
approval, or production definitively discontinued, issued in other countries, are to be sent.

CATEGORIES D1R, D2R, D3R AND D4R
Sheet DxR/1
The drawings are intended only to illustrate the essential dimensions (in mm)
of the gas-discharge light source
Figure 1
Category D1R - Type with Cables - Cap PK32d-3
Figure 2
Category D2R - Type with Connector - Cap P32d-3

CATEGORIES D1R, D2R, D3R AND D4R
Sheet DxR/3
The cap shall be pushed in this direction
Figure 5
Definition of Reference Axis
Figure 6
Maximum lamp outline

CATEGORIES D1R, D2R, D3R AND D4R
Sheet DxR/5
Position of the electrodes
This test is used to determine whether the electrodes are correctly positioned relative to the
reference axis and the reference plane
Measuring direction: light source side and top view
Dimension
in mm
Production
light sources
Standard
light sources
a1 d + 0.5 d + 0.2
a2 d + 0.7 d + 0.35
b1 0.4 0.15
b2 0.8 0.3
c 4.2 4.2
d = diameter of the electrode;
d < 0.3 for D1R and D2R;
d < 0.4 for D3R and D4R.
The top of the electrode nearest to the reference plane shall be positioned in the area defined by a1 and
b1. The top of the electrode furthest from the reference plane shall be positioned in the area defined by
a2 and b2.

CATEGORIESS D1R, D2R, D3R AND D4RD
Stray light
Sheet DxR/6
Page
2 out of 2
This test is used to determine unwanted reflected stray light by measuring the luminance in Zone A and
at Lines B and C, where Lmax is the maximumm luminance
of the arc measured m from viewing Direction B;
see Sheet DxR/2
When measuring the luminances from f measuring Direction
B as defined on Sheet DxR/7 with a set-up as
outlined in
Annex 5 to this Regulation, however with a circular field of 0.2Mmm diameter, the relative
luminance
expressed as a percentage of Lmaxx (at cross section D) shall be:
The area of Zone A
reference plane.
Zone A
Line B
Line C
is defined by the black
≤4.5%
≤15%
≤5.0%
coating, the
outer bulb and a planee at 24.5mmm from the

CATEGORIES D1S, D2S, D3S AND D4S
Sheet DxS/1
The drawings are intended only to illustrate the essential dimensions (in mm)
of the gas-discharge light source
Figure 1
Category D1S - Type with Cables - Cap PK32d-2
Figure 2
Category D2S - Type with Connector - Cap P32d-2

CATEGORIES D1S, D2S, D3S AND D4S
Sheet DxS/3
The cap shall be pushed in this direction
Figure 5
Definition of Reference Axis
Figure 6
Maximum Lamp Outline

CATEGORIES D1S, D2S, D3S AND D4S
Sheet DxS/5
Position of the electrodes
This test is used to determine whether the electrodes are correctly positioned relative to the
reference axis and the reference plane.
Measuring direction: light source side and top view
Dimension
in mm
Production
light sources
Standard
light sources
a1 d + 0.2 d + 0.1
a2 d + 0.5 d + 0.25
b1 0.3 0.15
b2 0.6 0.3
c 4.2 4.2
d = diameter of the electrode;
d < 0.3 for D1S and D2S;
d < 0.4 for D3S and D4S.
The top of the electrode nearest to the reference plane shall be positioned in the area defined by a1 and
b1. The top of the electrode furthest from the reference plane shall be positioned in the area defined by
a2 and b2.

CATEGORY D5S
Sheet D5S/1
The drawings are intended only to illustrate the essential dimensions (in mm)
of the gas-discharge light source
Figure 1
Category D5S – Cap PK32d-7

CATEGORY D5S
Sheet D5S/3
Position of the electrodes
Dimensions
Position and form of the arc
Production
light sources
Sheet D5S/4
Sheet D5S/5
Standard
light sources
α1, α2 55° minimum 55° minimum
D5S: Cap PK32d-7 in accordance with IEC Publication 60061 (sheet 7004-111-5)
Electrical and photometric characteristics
Rated voltage V 12/24 12/24
Rated wattage W 25 25
Test voltage V 13.2/28 13.2/28
Objective lamp wattage W 31 max. 31 max.
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
Objective Luminous flux lm 2,000 ± 300 2,000 ± 100
Hot-restrike switch-off time s 10 10

CATEGORY D5S
Sheet D5S/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 18.0mm from
the reference plane.
Luminance (relative)
D
s
r
Reference
axis
20% of
Lmax
Lmax
18.0

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.
Dimension in mm Production light sources Standard light sources
r (arc bending) 0.50 +/-0.25 0.50 +/-0.15
s (arc diffusion) 0.70 +/-0.25 0.70 +/-0.15

CATEGORY D6S
Sheet D6S/2
The cap shall be pushed in this direction
Figure 2
Definitionn of Reference Axis
Figure 3
Maximum Lamp Outline

CATEGORY D6S
Sheet D6S/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 D8R
Sheet D8R/1
The drawings are intended only to illustrate the essential dimensions (in mm)
of the gas-discharge light source
Figure 1
Category D8R - Cap PK32d-8

CATEGORY D8R
Sheet D8R/3
Dimensions
Position of the electrodes
Position and form of the arc
α11
α21
Production light
sources
D8R: Cap PK32d-8 in accordance with IEC Publication 60061(sheet 7004-111-5)
Electrical and photometric characteristics
Sheet D8R/4
Sheet D8R/5
55° min.
55° min.
Standard light
sources
Rated voltage of the ballast V 12 2/ 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 1,900 ± 300 1,900 ± 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

CATEGORY D8R
Sheet D8R/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 27.1 mm 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.
Dimension in mm Production light sources Standard light sources
r (arc bending) 0.50 ± 0.25 0.50 ± 0.15
s (arc diffusion) 0.70 ±- 0.25 0.70 ± 0.15

CATEGORY D8S
Sheet D8S/1
The drawings are intended only to illustrate the essentiall dimensionss (in mm)
Figure 1
Categoryy D8S – Cap
PK32d-1

CATEGORY D8S
Sheet D8S/3
Position of the electrodes
Dimensions
Position and form of the arc
Production
light sources
Sheet D8S/4
Sheet D8S/5
Standard
light sources
α1, α2 55° minimum 55° minimum
D8S: Cap PK32d-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

CATEGORY D8S
Sheet D8S/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 D9S
Sheet D9S/2
The cap shall be pushed in this direction
Figure 2
Definition of Reference Axis
Figure 3
Maximum Lamp Outline

CATEGORY D9S
Sheet D9S/4
Position of the electrodes
This test is used to determine whether the electrodes are correctly positioned relative to the reference
axis and the reference plane.
Side and top view (schematic):
Measuring direction: light source side and top view
Dimension
in mm
Production
light sources
Standard
light sources
a1 0.30 0.20
a2 0.50 0.25
b1 0.30 0.15
b2 0.60 0.30
c 3.00 3.00
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.
The geometrical data is valid for 27W
and 35W operation.

ANNEX 2
COMMUNICATION
(Maximum format: A4 (210 × 297mm))
issued by:
Name of administration:
.............................................
.............................................
.............................................
concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a type of gas-discharge light source pursuant to Regulation No. 99
Approval No.: ................................................. Extension No.: ...............................
1.
Gas-discharge light source
− category .........................................................
− rated wattage ................................................
2. Trade name or mark ..................................................................................................................
3. Manufacturer's name and address: ..........................................................................................
4. If applicable, name and address of manufacturer's representative: .........................................
5. Brand and type number of the ballast .......................................................................................
(In case the ballast is not integrated with the light source)
6. Submitted for approval on: ........................................................................................................
7. Technical Service responsible for conducting approval tests ...................................................
8. Date of report issued by that service: .......................................................................................
9. Number of report issued by that service: ..................................................................................
10. Approval granted/extended/refused/withdrawn : .....................................................................

ANNEX 3
EXAMPLE OF THE ARRANGEMENT OF THE APPROVAL MARK
(see Paragraph 2.4.4. of this Regulation)
The above approval mark affixed to a gas-discharge light source indicates that thee light source
has been
approved in the United Kingdom (E11)(
under the approval code 0A1. The first character of the
approval
code indicates that the approval was granted in accordance with the requirementsr
s of Regulation No. 99
in its original form.

9. ELECTRICAL AND PHOTOMETRIC TEST
10. COLOUR
Before any measurement, the light source shall be stabilised for a period of 15min.
The colour of the light source shall be measured in an integrating sphere using a measuring
system which shows the CIE chromaticity co-ordinates of the received light with a resolution
of ±0.002. The following figure shows the colour tolerance area for colour white and the
restricted tolerance area for the gas-discharge light sources D1R, D1S, D2R, D2S, D3R,
D3S, D4R, D4S, D5S, D6S, D8R and D8S.

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 Figure 1 or Figure 2 on Sheet DxR/1 or Sheet DxS/1;
– in Figure 3 or Figure 4 on Sheet DxR/2 or Sheet DxS/2.
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 on Sheet DxS/5, respectively Sheet DxR/5).
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 (e = 27.1 for D1R, D1S,
D2R, D2S, D3R, D3S, D4R and D4S).
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.

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.