+-------------+-------------------------------+-----------------------+
| ![](media/  |                               | **Advisory Circular** |
| image1.wmf) |                               |                       |
+-------------+-------------------------------+-----------------------+
| # U.S.      |                               |                       |
|  Department |                               |                       |
|             |                               |                       |
| **of        |                               |                       |
| Trans       |                               |                       |
| portation** |                               |                       |
|             |                               |                       |
| Federal     |                               |                       |
| Aviation    |                               |                       |
|             |                               |                       |
| Adm         |                               |                       |
| inistration |                               |                       |
+-------------+-------------------------------+-----------------------+

+-----------------------------+--------------------+-------------------+
| **Subject:** SPECIFICATION  | **Date:**          | **AC No:**        |
| FOR RUNWAY AND TAXIWAY      | September 12, 2006 | 150/5345-46C      |
| LIGHT FIXTURES              |                    |                   |
|                             | **Initiated by:**  | **Change:**       |
|                             | AAS-100            |                   |
+-----------------------------+--------------------+-------------------+

**1. PURPOSE.** This advisory circular (AC) contains the Federal
Aviation Administration (FAA) specifications for light fixtures to be
used on airport runways and taxiways.

**2.** **EFFECTIVE DATE**. Effective six months after the issue date of
this AC, only that equipment qualified per the specifications herein
will be listed per AC 150/5345-53, *Airport Lighting Equipment
Certification Program*.

**3.** **CANCELLATION**. AC 150/5345-46B, *Specification for Runway and
Taxiway Light Fixtures*, dated September 1, 1998, is canceled.

**4.** **APPLICATION**. The specifications contained in this AC are
recommended by the FAA in all applications involving development of this
nature. For airport projects receiving Federal funds under the airport
grant assistance or the passenger facility charge programs, the use of
these specifications is mandatory.

**5.** **PRINCIPAL CHANGES**. The following principal changes have been
incorporated:

**a.** Added new inset fixtures for curved taxiway centerlines where
additional conspicuity is warranted.

**b.** Deleted the requirement for red-blue lens combinations for L-850C
and L-861E fixtures.

**c.** The 20 ampere requirement for Mode 1 fixtures is removed.

**d.** Changed the operating low temperature requirement and added a
storage/shipping low temperature requirement.

**e.** Added 8 inch in-pavement fixtures with an additional requirement
for equipment qualification with adapter plates**.**

**f.** Deleted the requirement for Option 2 Automatic Lampchanger
(L-850F).

**g**. Updated all applicable documents and document sources (Chapter
2).

**6.** **METRIC UNITS**. To promote an orderly transition to metric
units, this AC contains both English and metric dimensions. The metric
conversions may not be exact metric equivalents and, until there is an
official changeover to the metric system, the English dimensions will
govern.

**7. COMMENTS OR SUGGESTIONS** for improvements to this AC should be
sent to:

> Manager, Airport Engineering Division
>
> Federal Aviation Administration
>
> ATTN: AAS-100
>
> 800 Independence Avenue, S.W.
>
> Washington, DC 20591

**8. COPIES OF THIS AC.** The Office of Airport Safety and Standards is
in the process of making ACs available to the public through the
Internet. These ACs may be accessed through the FAA home page
(www.faa.gov). A printed copy of this AC and other ACs can be ordered
from the U.S. Department of Transportation, Subsequent Distribution
Office, Ardmore East Business Center, 3341 Q 75th Avenue, Landover, MD
20785.

ACs may also be ordered through the AC Checklist, which can be accessed
through the FAA website http://www.faa.gov/aba. To access the AC
Checklist, select \"Advisory Circular Checklist.\"

![](media/image2.png){width="2.5541666666666667in"
height="0.5965277777777778in"}

DAVID L. BENNETT

Director of Airport Safety and Standards

TABLE OF CONTENTS.

CHAPTER 1. SCOPE AND CLASSIFICATION.
[1](#chapter-1.-scope-and-classification.)

1.1. Scope. [1](#scope.)

1.2. Classification. [1](#classification.)

1.2.1. Types. [1](#types.)

1.2.2. Classes. [3](#classes.)

1.2.3. Modes. [3](#modes.)

1.2.4. Styles. [3](#styles.)

1.2.5. Optional Items. [4](#optional-items.)

CHAPTER 2. APPLICABLE DOCUMENTS. [5](#chapter-2.-applicable-documents.)

2.1. General. [5](#general.)

2.2. Federal Aviation Administration (FAA) Advisory Circulars (ACs) and
Engineering Briefs.
[5](#federal-aviation-administration-faa-advisory-circulars-acs-and-engineering-briefs.)

2.3. Federal Standard. [5](#federal-standard.)

2.4. Military Publications. [5](#military-publications.)

2.4.1. Military Standard. [5](#military-standard.)

2.4.2. Military Specifications. [5](#military-specifications.)

2.5. American National Standards Institute (ANSI) Publications.
[5](#american-national-standards-institute-ansi-publications.)

2.6. American Society for Testing and Materials (ASTM) Standard.
[6](#american-society-for-testing-and-materials-astm-standard.)

2.7. Illuminating Engineering Society (IES) Publications.
[6](#illuminating-engineering-society-ies-publications.)

2.8. Institute of Transportation Engineers (ITE) Standard.
[6](#institute-of-transportation-engineers-ite-standard.)

2.9. Society of Automotive Engineers (SAE) Publication.
[6](#society-of-automotive-engineers-sae-publication.)

CHAPTER 3. REQUIREMENTS. [9](#chapter-3.-requirements.)

3.1. General. [9](#general.-1)

3.2. Environmental Requirements. [9](#environmental-requirements.)

3.3. Photometric Requirements. [9](#photometric-requirements.)

3.4. Dimensional Requirements. [12](#dimensional-requirements.)

3.4.1. In-pavement Lights. [13](#in-pavement-lights.)

3.4.2. Elevated Lights. [14](#elevated-lights.)

3.4.3. L-804 Runway Guard Light. [15](#l-804-runway-guard-light.)

3.5. Structural Integrity. [16](#structural-integrity.)

3.5.1. Vibration. [16](#vibration.)

3.5.2. Static Load. [16](#static-load.)

3.5.3. Shear Load. [17](#shear-load.)

3.5.4. Hydraulic Impact. [17](#hydraulic-impact.)

3.5.5. Mechanical Impact. [17](#mechanical-impact.)

3.5.6. Leakage Resistance. [17](#leakage-resistance.)

3.5.7. Surface Temperature. [17](#surface-temperature.)

3.6. Drainage. [17](#drainage.)

3.6.1. Elevated Lights. [17](#elevated-lights.-1)

3.6.2. In-pavement Lights. [17](#in-pavement-lights.-1)

3.7. Electrical Requirements. [18](#electrical-requirements.)

3.7.1. In-pavement Lights. [18](#in-pavement-lights.-2)

3.7.2. Elevated Lights. [18](#elevated-lights.-2)

3.7.3. L-804 Runway Guard Light Fixture.
[19](#l-804-runway-guard-light-fixture.)

3.8. Optical Requirements. [20](#optical-requirements.)

3.9. Maintainability Requirements. [20](#maintainability-requirements.)

3.10. Materials and Finish. [21](#materials-and-finish.)

3.10.1. In-pavement Lights. [21](#in-pavement-lights.-3)

3.11. Instruction Manual. [22](#instruction-manual.)

3.12. Optional Items. [22](#optional-items.-1)

3.12.1. Option 1 - Lamp Bypass. [22](#option-1---lamp-bypass.)

3.12.2. Option 3 - Shields. [22](#option-3---shields.)

3.12.3. Option 4 - Mounting Hardware.
[22](#option-4---mounting-hardware.)

3.12.4. Option 5 - Two Lamps for Bidirectional Taxiway Centerline
Fixtures.
[23](#option-5---two-lamps-for-bidirectional-taxiway-centerline-fixtures.)

CHAPTER 4. QUALIFICATION REQUIREMENTS.
[25](#chapter-4.-qualification-requirements.)

4.1. Qualification Request. [25](#qualification-request.)

4.2. General. [25](#general.-2)

4.3. Photometric Testing. [25](#photometric-testing.)

4.3.1. Procedures. [25](#procedures.)

4.3.2. Chromaticity. [26](#chromaticity.)

4.3.3. Calculations. [26](#calculations.)

4.3.4. Special Conditions - In-pavement Lights.
[27](#special-conditions---in-pavement-lights.)

4.3.5. Special Conditions - Elevated Lights.
[27](#special-conditions---elevated-lights.)

4.3.6. L-804 Flash Intensity Ratio Test.
[27](#l-804-flash-intensity-ratio-test.)

4.4. Load Test. [27](#load-test.)

4.5. In-pavement Light Fixture Testing.
[28](#in-pavement-light-fixture-testing.)

4.5.1. Mechanical Tests. [28](#mechanical-tests.)

4.5.2. Thermal Tests. [29](#thermal-tests.)

4.5.3. Water Tests. [30](#water-tests.)

4.5.4. Accelerated Life Test. [30](#accelerated-life-test.)

4.5.5. Insulation Resistance Check. [31](#insulation-resistance-check.)

4.5.6. Protective Plating Test. [31](#protective-plating-test.)

4.6. Elevated Light Tests. [31](#elevated-light-tests.)

4.6.1. High Temperature Test. [31](#high-temperature-test.)

4.6.2. Low Temperature Test. [31](#low-temperature-test.-1)

4.6.3. Rain Test. [32](#rain-test.)

4.6.4. Salt Fog Test. [32](#salt-fog-test.)

4.6.5. Yield Device. [32](#yield-device.-1)

4.6.6. Solar Radiation Test. [32](#solar-radiation-test.)

4.6.7. Wind Test. [32](#wind-test.)

4.6.8. Certification. [33](#certification.)

4.6.9. L-804 Operational Test. [33](#l-804-operational-test.)

4.6.10. Elevated Light Insulation Test.
[33](#elevated-light-insulation-test.)

CHAPTER 5. PRODUCTION TESTING. [35](#chapter-5.-production-testing.)

5.1. Testing. [35](#testing.)

5.2. Production Test Records. [35](#production-test-records.)

**TABLE OF FIGURES.**

**Table 1. Photometric Requirements for In-pavement Lights.**
[10](#__RefHeading___Toc144781909)

**Table 2. Photometric Requirements for Directional Elevated Lights.**
[11](#__RefHeading___Toc144781910)

**Table** **3**. **Photometric Requirements for Omnidirectional Elevated
Lights.** [12](#__RefHeading___Toc144781911)

# CHAPTER 1. SCOPE AND CLASSIFICATION.

## Scope.

This specification covers the requirements for light fixtures for use on
airport runways and taxiways.

## Classification.

The following light fixtures are covered by this specification:

### Types.

a.  **Runway In-pavement Lights.**

+-----------+-----------------------+----------------------------------+
| **Type**  | **Use**               | **Light Direction and Colors**   |
+-----------+-----------------------+----------------------------------+
| L-850A    | Runway centerline,    | Bidirectional: white-white,      |
|           | Land and Hold Short   | white-red                        |
|           | Operations (LAHSO)    |                                  |
|           |                       | Unidirectional: white, red       |
+-----------+-----------------------+----------------------------------+
| L-850B    | Runway Touchdown      | Unidirectional: white            |
|           | Zone;                 |                                  |
|           |                       |                                  |
|           | Medium Intensity      |                                  |
|           | Approach Lighting     |                                  |
|           | System                |                                  |
+-----------+-----------------------+----------------------------------+
| L-850C    | Runway edge,          | Bidirectional: White-white,      |
|           | displaced threshold   | white- yellow, white-red,        |
|           |                       | yellow-red, yellow-green         |
+-----------+-----------------------+----------------------------------+
| L-850D    | Runway threshold/end  | Bidirectional: green-red,        |
|           |                       | red-red                          |
|           |                       |                                  |
|           |                       | Unidirectional: green            |
+-----------+-----------------------+----------------------------------+
| L-850E    | Medium Intensity      | Unidirectional: green            |
|           | Approach Lighting     |                                  |
|           | System; Runway        |                                  |
|           | threshold             |                                  |
+-----------+-----------------------+----------------------------------+
| L-850F    | LAHSO                 | Unidirectional: white; flashing  |
+-----------+-----------------------+----------------------------------+

b.  **Taxiway In-pavement Lights.**

+-----------+-----------------------+----------------------------------+
| **Type**  | **Use**               | **Light Direction and Colors**   |
+===========+=======================+==================================+
| L-852A    | Taxiway centerline,   | Bidirectional (narrow beam):     |
|           |                       | green-green, green-yellow,       |
|           | Straight sections;    | yellow-yellow                    |
|           |                       |                                  |
|           | Clearance bar         | Unidirectional (narrow beam):    |
|           |                       | green, yellow                    |
|           | (≥1200 Runway Visual  |                                  |
|           | Range (RVR))          |                                  |
+-----------+-----------------------+----------------------------------+
| L-852B    | Taxiway centerline,   | Bidirectional (wide beam):       |
|           |                       | green-green, yellow-yellow       |
|           | Curved sections;      |                                  |
|           |                       | Unidirectional (wide beam):      |
|           | (≥1200 RVR)           | green, yellow                    |
+-----------+-----------------------+----------------------------------+
| L-852C    | Taxiway centerline    | Bidirectional (narrow beam):     |
|           |                       | green-green,                     |
|           | Straight section;     |                                  |
|           |                       | green-yellow, yellow-yellow      |
|           | Clearance bar (\<1200 |                                  |
|           | RVR)                  | Unidirectional (narrow beam):    |
|           |                       | green, yellow                    |
+-----------+-----------------------+----------------------------------+
| L-852D    | Taxiway centerline,   | Bidirectional (wide beam):       |
|           |                       | green-green, yellow-yellow       |
|           | curved sections       |                                  |
|           |                       | Unidirectional (wide beam):      |
|           | (\<1200 RVR)          | green, yellow, white             |
+-----------+-----------------------+----------------------------------+
| L-852E    | Taxiway intersections | Omni-directional: yellow         |
|           |                       |                                  |
|           | (≥1200 RVR)           |                                  |
+-----------+-----------------------+----------------------------------+
| L-852F    | Taxiway intersections | Omni-directional: yellow         |
|           |                       |                                  |
|           | (\<1200 RVR)          |                                  |
+-----------+-----------------------+----------------------------------+
| L-852G    | Runway Guard          | Unidirectional (wide beam):      |
|           |                       | yellow; alternately flashing     |
+-----------+-----------------------+----------------------------------+
| L-852J    | Taxiway centerline,   | Bidirectional (wide beam):       |
|           |                       | green-green, yellow-yellow       |
|           | curved sections       |                                  |
|           |                       | Unidirectional (wide beam):      |
|           | ≥1200 RVR)            | green, yellow                    |
+-----------+-----------------------+----------------------------------+
| L-852K    | Taxiway centerline,   | Bidirectional (wide beam):       |
|           |                       | green-green, yellow-yellow       |
|           | curved sections       |                                  |
|           |                       | Unidirectional (wide beam):      |
|           | (\<1200 RVR)          | green, yellow                    |
+-----------+-----------------------+----------------------------------+
| L-852S    | Stop bar              | Unidirectional (wide beam): red  |
+-----------+-----------------------+----------------------------------+
| L-852T    | Taxiway edge, Apron   | Omni-directional: blue           |
|           | edge                  |                                  |
+-----------+-----------------------+----------------------------------+

c.  **Elevated Lights.**

+-----------+-----------------------+----------------------------------+
| **Type**  | **Use**               | **Light Direction and Colors**   |
+===========+=======================+==================================+
| L-804     | Runway Guard          | Unidirectional: yellow;          |
|           |                       | alternately flashing             |
+-----------+-----------------------+----------------------------------+
| L-860     | Runway edge, Visual   | Omni-directional: white          |
|           | Flight Rules (VFR)    |                                  |
|           | runways               |                                  |
+-----------+-----------------------+----------------------------------+
| L-860E    | Runway threshold/end, | Bidirectional: red-green,        |
|           |                       | red-red                          |
|           | VFR runways           |                                  |
|           |                       | Unidirectional: green            |
+-----------+-----------------------+----------------------------------+
| L-861     | Runway edge, non-     | Omni-directional: white, yellow  |
|           | precision Instrument  |                                  |
|           | Flight Rules (IFR)    | Bidirectional: white-yellow,     |
|           | runways, displaced    | white-red, yellow-red,           |
|           | threshold             | green-yellow                     |
+-----------+-----------------------+----------------------------------+
| L-861E    | Runway threshold/end, | Bidirectional: red-green,        |
|           | displaced threshold,  | red-red                          |
|           |                       |                                  |
|           | non-precision IFR     | Unidirectional: green            |
|           | runways               |                                  |
+-----------+-----------------------+----------------------------------+
| L-861SE   | Runway threshold/end, | Bidirectional: red-green         |
|           |                       |                                  |
|           | non-precision IFR     | Unidirectional: green            |
|           | runways               |                                  |
+-----------+-----------------------+----------------------------------+
| L-861T    | Taxiway edge, Apron   | Omni-directional: blue           |
|           | edge                  |                                  |
+-----------+-----------------------+----------------------------------+
| L-862     | Runway edge,          | Bidirectional: white-white,      |
|           | threshold, displaced  | white-yellow,                    |
|           | threshold, precision  |                                  |
|           | IFR runways           | white-red, green-yellow          |
+-----------+-----------------------+----------------------------------+
| L-862E    | Runway threshold/end, | Bidirectional: red-green,        |
|           | displaced threshold,  | red-red                          |
|           |                       |                                  |
|           | precision IFR runways | Unidirectional: green            |
+-----------+-----------------------+----------------------------------+
| L-862S    | Stop bar              | Unidirectional: red              |
+-----------+-----------------------+----------------------------------+

### Classes. 

The class designation applies only to in-pavement fixtures:

> Class 1 Direct-mounted fixtures
>
> Class 2 Base-mounted fixtures

### Modes.

The mode designation describes the type of electrical power supply
required for the fixture:

> Mode 1 Constant current fixture, supplied by 6.6 amperes (A)
>
> Mode 2 Constant voltage fixture, supplied by 120/240 volts AC (VAC)

### Styles.

The style designation applies only to in-pavement fixtures and describes
the total height above finished grade (X) where:

> Style 1\* 1/2 inch (12.70 mm) \< X ≤ 1 inch (25.40 mm)
>
> Style 2 1/4 inch (6.35 mm) \< X ≤ 1/2 inch (12.70 mm)
>
> Style 3 X ≤ 1/4 inch (6.35 mm)
>
> \* Applies only to L-850 C, D, and E, and L-852 E and F

### Optional Items.

The manufacturer may provide the following optional features. These
options must meet the requirements of 3.12:

> Option 1 Lamp By-Pass (in-pavement lights)
>
> Option 3 Shields (elevated lights)
>
> Option 4 Mounting Hardware (elevated lights)
>
> Option 5 Two lamps for bidirectional taxiway centerline fixtures

# CHAPTER 2. APPLICABLE DOCUMENTS.

## General.

The following documents, of the issue in effect on the date of
application for qualification, are applicable to the extent specified in
this AC.

## Federal Aviation Administration (FAA) Advisory Circulars (ACs) and Engineering Briefs.

> AC 150/5200-30 *Airport Winter Safety and Operations*
>
> AC 150/5340-30 *Design and Installation Details for Airport Visual
> Aids* []{.mark}
>
> AC 150/5345-10 *Specification for Constant Current Regulators and
> Regulator Monitors*
>
> AC 150/5345-26 *Specification for L-823, Plug and Receptacle, Cable
> Connectors*
>
> AC 150/5345-42 *Specification for Airport Light Bases, Transformer
> Housings, Junction Boxes, and Accessories*
>
> AC 150/5345-47 *Specification for Series to Series Isolation
> Transformers for Airport Lighting Systems*
>
> AC 150/5345-53 *Airport Lighting Equipment Certification Program*
>
> Engineering Brief 67 *Light Sources Other Than Incandescent and Xenon
> for Airport and Obstruction Lighting Fixtures.*

## Federal Standard.

> FED-STD-595B *Colors Used in Government Procurement*

## Military Publications.

### Military Standard.

> MIL-STD-810F *Environmental Test Methods and Engineering Guidelines*

### Military Specifications.

> MIL-C-7989B *General Specification for Covers, Light-Transmitting, for
> Aeronautical Lights*
>
> MIL-DTL-13924C *Coating, Oxide, Black, for Ferrous Metals*

## American National Standards Institute (ANSI) Publications.

> ANSI/ASQC Z1.4 *Sampling Procedures and Tables for Inspection by
> Attributes 1993*
>
> ANSI B1.1 *Unified Inch Screw Threads (UN and UNR Thread Form)*
>
> ANSI B46.1 *Surface Texture (Surface Roughness, Waviness, and Lay)*
>
> ANSI/EIA 557 *Statistical Process Control Systems*

## American Society for Testing and Materials (ASTM) Standard.

> B-633 *Standard Specification for Electrodeposited Coatings of Zinc on
> Iron and Steel*

## Illuminating Engineering Society (IES) Publications.

> IES LM-35 *IES Approved Method for Photometric Testing of Floodlights
> Using Incandescent Filament or Discharge Lamps*
>
> *IES Guide for Calculating the Effective Intensity of Flashing Signal
> Lights, published in Illuminating Engineering, Volume LIX, Page 747
> (November 1964)*
>
> IES LM-54 *Lamp Seasoning*

## Institute of Transportation Engineers (ITE) Standard.

> ST-017 *Equipment and Material Standards of the ITE, Vehicle Traffic
> Control Signal Heads*

## Society of Automotive Engineers (SAE) Publication.

> SAE-AS25050 *Colors, Aeronautical Lights and Lighting Equipment,
> General Requirements For*

FAA ACs may be obtained from:

> U.S. Department of Transportation
>
> Subsequent Distribution Office
>
> Ardmore East Business Center
>
> 3341 Q 75^th^ Ave.
>
> Landover, MD 20785
>
> Telephone: (301) 322-4961
>
> FAX: (301) 386-5394
>
> Website:
> www.faa.gov/airports_airtraffic/airports/resources/advisory_circulars/

FAA Engineering Briefs may be obtained from:

Website:
www.faa.gov/airports_airtraffic/airports/construction/engineering_briefs

Federal standards and specifications may be obtained from:

> Federal Supply Services
>
> Specification Section
>
> 470 L\'Enfant Plaza East
>
> SW Suite 8100
>
> Washington, DC 20407
>
> Telephone: (202) 619-8925
>
> FAX: (202) 619-8985
>
> Web site: [www.dsp.dla.mil](http://www.dsp.dla.mil/)

Military Standards and Specifications may be obtained from:

> DAPS/DODSSP
>
> Building 4, Section D
>
> 700 Robbins Avenue
>
> Philadelphia, PA 19111-5094
>
> Telephone: (215) 697-2179
>
> FAX: (215) 697-1460
>
> Website: dodssp.daps.dla.mil

ANSI publications may be obtained from:

> ANSI
>
> 1819 L Street NW
>
> (between 18th and 19th Streets)
>
> 6th Floor
>
> Washington, DC 20036
>
> Customer Service/Document Sales
>
> Telephone: (212) 642-4980
>
> Website: webstore.ansi.org/ansidocstore/default.asp

ASTM standards may be obtained from:

> ASTM International
>
> 100 Barr Harbor Drive
>
> PO Box C700
>
> West Conshohocken, PA 19428-2959
>
> Telephone: (610) 832-9585
>
> FAX: (610) 832-9555
>
> Website: www.astm.org/cgi-bin/SoftCart.exe/index.shtml?E+mystore

IES of North America (IESNA) documents may be obtained from:

> IESNA
>
> 120 Wall Street, Floor 17
>
> New York, NY 10005
>
> Telephone: (212) 248-500
>
> FAX: (212) 248-5017
>
> Website: www.iesna.org/shop/

ITE publications may be obtained from:

> ITE
>
> 1099 14th Street, NW
>
> Suite 300 West
>
> Washington, DC 20005-3438
>
> Telephone: (202) 289-0222
>
> Website: www.ite.org/bookstore/index.asp

# CHAPTER 3. REQUIREMENTS.

## General.

This specification covers the requirements for in-pavement and elevated
light fixtures used on airport runways and taxiways.

## Environmental Requirements.

The light fixtures must achieve specified performance under the
following environmental conditions:

a.  Temperature.

    1.  Operating: exposure to any temperature from -40 degrees
        Fahrenheit (F) (-40 degrees Celsius (C)) to 131 degrees F (55
        degrees C).

    2.  Storage/shipping: exposure to any temperature from -67 degrees F
        (-55 degrees C) to 131 degrees F (55 degrees C).

b.  Temperature shock. Exposure of the hot light fixture to cold water
    spray.

c.  Salt fog. Exposure to a corrosive salt atmosphere.

d.  Wind. Exposure to wind velocities of 300 mph (482 kph) for all
    L-804, L-861, and L-862 fixtures, and 150 mph (241 kph) for all
    other elevated fixtures.

e.  Precipitation. Exposure to rain, snow, ice, and standing water.

f.  Solar radiation. Exposure to solar radiation.

## Photometric Requirements.

a.  The photometric performance of the fixtures is defined in Tables 1,
    2, and 3. The beam coverage angles in the table define the size of
    an ellipse, circle, or rectangle. (For this discussion, it is
    assumed to be an ellipse, but the same guidelines apply to a circle
    or a rectangle.)

b.  The light intensity inside the ellipse, when averaged per paragraph
    4.3, must equal or exceed the intensity specified in the table.
    Additionally, the intensity must be at least one-half the specified
    value everywhere inside the ellipse.

c.  For some fixtures, a 10 percent ellipse is also defined. The two
    ellipses are concentric; i.e., the main beam ellipse is exactly
    centered in the 10 percent ellipse. At every point on the 10 percent
    ellipse, the light intensity must be at least 10 percent of the
    specified value.

d.  For in-pavement lights, part of the 10 percent ellipse may lie below
    grade; this area may be disregarded. The light color must match the
    aviation colors defined in SAE-AS25050 except, as noted in the
    tables 1 and 2.

e.  The average measured intensity may not be more than three times the
    specified average intensity. For fixtures with a minimum but no
    average intensity requirement, the measured minimum may be no more
    than three times the specified minimum intensity. Bi-directional,
    split color, fixtures are exempt from this requirement if a single
    light source is used.

[]{#__RefHeading___Toc144781909 .anchor}**Table 1. Photometric
Requirements for In-pavement Lights.**

  ---------- ----------- ------- --------- -------- -------------- -------------- ----------- ------------ ----------
  **Type**   **Minimum                              **Intensity                                            
             beam                                   (candelas)                                             
             coverage                               (b)**                                                  
             (degrees)                                                                                     
             (a)**                                                                                         

             **Main beam         **10               **White**      **Yellow**     **Green**   **Red**      **Blue**
             (c)**               percent                                                                   
                                 (d)**                                                                     

             **H**       **V**   **H**     **V**                                                           

  L-850A     ±5          0.2 to  ±7        -4 to 13 5,000                                     750          
                         9                                                                                 

                                                                                                           

  L-850B     -1 to 9     2 to 9  -3 to 11  -0.5 to  5,000                                                  
  **(i)**                                  11.5                                                            

                                                                                                           

  L-850C     -2 to 9     0.2 to  -4 to 11  -2.5 to  10,000         5,000          3,300       1,500        
                         7                 9.5                                                             

                                                                                                           

  L-850D     -2 to 9     1 to 10                                                  3,300                    

             ±6          0.2 to  ±7.5      -2.5 to                                            2,500        
                         4.7               7.5                                                             

                                                                                                           

  L-850E     ±6          1 to 9                                                   5,000                    

                                                                                                           

  L-850F     ±5          0.2 to  ±7        -4 to 13 5,000**(e)**                                           
                         9                                                                                 

                                                                                                           

  L-852A     ±10         1 to 4  ±16       0.5 to                  20             20                       
                                           10                                                              

                                                                                                           

  L-852B     ±30         1 to 4  ±30       0.5 to                  20             20                       
                                           10                                                              

                                                                                                           

  L-852C     ±3.5        1 to 8  ±4.5      0 to 13                 200            200                      

                                                                                                           

  L-852D     ±30         1 to 10 ±30       0 to 15  150            100            100                      

                                                                                                           

  L-852E     360         1 to 8                                    50**(f)**                               

                                                                                                           

  L-852F     360         1 to 10                                   200**(f)**                              

                                                                                                           

  L-852G     ±24         1 to 10 ±30       0.5 to                  1,000**(g)**                            
                                           13                                                              

                                                                                                           

  L-852J     -3.5 to 35  1 to 4  -4.5 to   0.5 to                  20             20                       
                                 36        10                                                              

                                                                                                           

  L-852K     -3.5 to 35  1 to 10 -5.5 to   0 to 10                 100            100                      
                                 37                                                                        

                                                                                                           

  L-852S     ±24         1 to 10 ±30       0.5 to                                             300**(g)**   
                                           13                                                              

                                                                                                           

  L-852T     360         1 to 6                                                                            2**(h)**
  ---------- ----------- ------- --------- -------- -------------- -------------- ----------- ------------ ----------

**NOTES:**

*(a) For runway fixtures, beam coverage given is for the extremities of
an ellipse. For taxiway fixtures, beam coverage is for the extremities
of a rectangle with the exception of L-852G for which corners may be
rounded on a 5-degree radius.*

*(b) Values given represent minimum average intensity except for L-850E
and L-852T, where minimum intensity is given. See paragraph 4.3.1 for a
method of calculating average beam intensities.*

*(c) In addition to the average intensity requirements, all points
within the main beam must be at least fifty percent of the specified
average intensity.*

*(d) The intensity in this isocandela curve must be at least 10 percent
of the specified minimum average intensity. The main beam and 10 percent
curves are concentric; that is, the main beam curve lies exactly in the
center of the 10 percent curve. For in-pavement lights, any part of the
curve that falls below grade may be disregarded.*

*(e) In the case of L-850F, each lamp must independently meet the
photometrics.*

*(f) Twenty-five percent reduction of candela intensity is allowed at
structural ribs.*

*(g) L-852S must be traffic signal red and L-852G must be traffic signal
yellow per the ITE Standard for Vehicle Traffic Control Signal Heads
(ST-017).*

*(h) L-852T coverage is 2 candelas minimum from 1 to 6 degrees
vertically and must be visible for angles from 15 to 90 degrees
(visually verified) as projected. Use of this light should be restricted
to where elevated lights may be damaged by jet blast or where they
interfere with aircraft operations. Manufacturers must advise potential
users of this fact before providing these lights or tag them to that
effect.*

*(i) L-850B photometrics are for a toed left fixture. The fixture may
also be supplied as toed right or straight.*

[]{#__RefHeading___Toc144781910 .anchor}**Table 2. Photometric
Requirements for Directional Elevated Lights.**

  ---------- ------------- -------- ------- --------- -------- ------------- ------------ ----------- ---------
  **Type**   **Minimum                                         **Intensity                            
             Beam Coverage                                     (candelas)                             
             (Degrees)**                                       (b)**                                  

             **Notes**     **Main           **10               **White**     **Yellow**   **Green**   **Red**
                           beam             percent                                                   
                           (e)**            (e)**                                                     

                           **H**    **V**   **H**     **V**                                           

  L-804      **(f)**       ±8       ±8      ±25       ±25                    3,000                    
                                                                             **(g)**                  

                                                                                                      

  L-861E     **(d)**       ±1.5     3.5 to                                                300         
                                    5.5                                                               

             **(d)**       ±3       1.5 to                                                180         
                                    7.5                                                               

             **(d)**       ±5       0 to 9                                                90          10

                                                                                                      

  L-861SE    **(a)**       ±15      2 to 10 ±20       -3 to 15                            600         

             **(d)**       ±5       0 to 9                                                            20

                                                                                                      

  L-862      **(a) (c)**   -2 to 9  0 to 7  -4 to 11  -2.5 to  10,000        5,000        2,500       2,000
                                                      9.5                                             

                                                                                                      

  L-862E     **(a)**       ±6       0.2 to  ±7.5      -2.5 to                                         2,500
                                    4.7               7.5                                             

             **(a)**       -2 to 9  1 to 10                                               3,200       

                                                                                                      

  L-862S     **(d)**       ±7       ±4      ±14       ±8                                              2,000
                                                                                                      **(g)**
  ---------- ------------- -------- ------- --------- -------- ------------- ------------ ----------- ---------

**NOTES:**

*(a) Beam coverage is given for the extremities of an ellipse.*

*(b) Values given represent minimum average intensity. See paragraph
4.3.1*

*(c) Minimum of 50 candelas (measured in white light) required
omni-directionally for all vertical angles to 15 degrees.*

*(d) Beam coverage is given for the extremities of a rectangle.*

*(e) See notes (c) and (d) of Table 1.*

*(f) Beam coverage is given for the extremities of a circle, except that
the area below -10 degrees vertical is ignored. Additionally, the
intensity must be at least 1,000 cd at every point within a circle of
±15 degrees.*

*(g) Red for L-862S must be traffic signal red, and yellow for L-804
must be traffic signal yellow per the Institute of Transportation
Engineers Standard for Vehicle Traffic Control Signal Heads (ST-017).*

[]{#__RefHeading___Toc144781911 .anchor}**Table** **3**. **Photometric
Requirements for Omnidirectional Elevated Lights.**

+---------+----------+-------------+-------------+--------------------+
| #####   | #####    | **Intensity |             |                    |
|         |          | (candelas)  |             |                    |
| *       | *        | (a)**       |             |                    |
| *Type** | *Color** |             |             |                    |
+---------+----------+-------------+-------------+--------------------+
|         |          | **2 to 10   |             | **10 to 15         |
|         |          | degrees**   |             | degrees**          |
+---------+----------+-------------+-------------+--------------------+
|         |          | **Minimum** | **Minimum** | **Minimum**        |
|         |          |             |             |                    |
|         |          |             | **Average** |                    |
|         |          |             |             |                    |
|         |          |             | **          |                    |
|         |          |             | Intensity** |                    |
+---------+----------+-------------+-------------+--------------------+
| L-860   | White    | 15          | 25          | 10                 |
+---------+----------+-------------+-------------+--------------------+
|         |          |             |             |                    |
+---------+----------+-------------+-------------+--------------------+
| L-860E  | Green    | 10          | 15          | 5                  |
+---------+----------+-------------+-------------+--------------------+
|         | Red      | 3           | 5           | 1                  |
+---------+----------+-------------+-------------+--------------------+
|         |          |             |             |                    |
+---------+----------+-------------+-------------+--------------------+
| L-861   | White    | 75          | 125         | 40                 |
+---------+----------+-------------+-------------+--------------------+
|         | Yellow   | 37          | 67          | 20                 |
+---------+----------+-------------+-------------+--------------------+
|         | Green    | 28          | 46          | 14                 |
+---------+----------+-------------+-------------+--------------------+
|         | Red      | 3           | 5           | 1                  |
|         | **(c)**  |             |             |                    |
+---------+----------+-------------+-------------+--------------------+
|         |          |             |             |                    |
+---------+----------+-------------+-------------+--------------------+
| L-861T  | Blue     | 2**(b)**    |             |                    |
+---------+----------+-------------+-------------+--------------------+

**NOTES:**

*(a) Angles measured in vertical plane.*

*(b) L-861T coverage is 2 candelas minimum from 0 to 6 degrees
vertically and must be visible from 15 to 90 degrees vertical (verified
visually) as projected.*

*(c) L-861 red is only 180 degrees of horizontal coverage for
unidirectional and bidirectional.*

## Dimensional Requirements.

The light fixtures described in this specification may be installed
directly in the ground or pavement, or they may be mounted on top of a
standard FAA light base and transformer housing (specified in
AC 150/5345-42). Dimensional requirements for both methods of mounting
and other essential dimensions are given below.

### In-pavement Lights.

The slope of the top surface of the light fixture, which protrudes above
finish grade, must be no more than 20 degrees (recesses excepted).

#### Class 1 (Direct Mounted).

When not installed on an L-868 base, the in-pavement light fixture is
typically installed in a recess cut in the pavement and secured by an
adhesive compound poured around the lights. The power conductors are run
to the light fixture through a saw kerf in the pavement. The light
fixture must be designed to maximize adhesion via the securing compound
and to resist rotation and uplift. All optical components and electrical
components (except those used to carry the incoming power) must be
removable for servicing without breaking the adhesive bond. Any
associated shallow base or other installation accessories must withstand
the specified loading and environmental stress. The manufacturer must
specify in the installation instructions the shape and dimensions of the
recess required for installation of the light. If installation bolts are
used, they must be furnished with their companion lock washers.

#### Class 2 (Base Mounted).

a.  Interface details and dimensions of L-868 bases are shown in AC
    150/5345-42, *Specification for Airport Light Bases, Transformer
    Housings, Junction Boxes, and Accessories.* Installation standards
    may be found in AC 150/5340-30, *Design and Installation Details for
    Airport Visual Aids*.

b.  Critical interface areas of the light fixture are the outer
    diameter, top flange, bolt holes, and throat projection. For L-850 A
    and B, the outer diameter of the light fixture must be 11.94 inches
    (303.27 mm) ±0.05 inch (1.27 mm) and must mate with an L-868 base
    size B. For 8-inch (203.20 mm) fixtures, the outer diameter must be
    8.00 ±0.05 inch (1.27 mm) and must mate with an L-868 base size A
    or B. Adapter rings must be qualified with the fixture.

c.  For L-850 C, D, and E, the fixture must have an outside diameter of
    17.25 inches (438.15 mm) ±0.09 inch (2.29 mm), and must mate with an
    L-868 base size C (alternatively, the C, D, and E may use the same
    dimensions as the A and B).

d.  The light fixture must have a projection that extends at least 1/4
    inch (6.35 mm) down through the L-868 assembly. The diameter of this
    projection must be 0.06 inch +0.00, -0.01 inch (1.52 mm +0.0,
    -0.25 mm) less than the nominal diameter of the top flange cut-out.

e.  Semi-flush lights must be designed to mount on an L-868 base whose
    top surface is 3/4 inch (19.05 mm) below grade; flush lights may be
    designed to fit atop a base placed up to 1-1/4 inch (31.75 mm) below
    grade (L-850 C, D, and E may use either criteria).

f.  If the installation of the light requires grooves or recesses in the
    surrounding pavement, the manufacturer must describe the dimensions
    of these recesses and how they are to be drained.

g.  The fixture (with the exception of 8 inch fixtures) must be designed
    to be secured by six mounting bolts supplied with the base and
    described in AC 150/5345-42.

h.  The fixture bolt hole configuration must match the Type L-868 base
    that it is sized to fit (with the exception of 8 inch fixtures). In
    addition, the axis between one pair of bolt holes on opposite sides
    of the fixture must be perpendicular to the direction of the runway
    centerline.

### Elevated Lights. 

The standard installed height of elevated light fixtures must not exceed
14 inches (355.60 mm) (except L-804 that has a minimum height of 14
inches (355.60 mm) from the bottom of the light emitting surface to
ground level). However, this height may be increased, in increments of 2
inches (50.80 mm), to a maximum 30 inches (762.00 mm) for applications
in snow areas (except L-804 that has a maximum of 26 inches (660.40 mm)
including fixture pitch).

a.  Installation standards are contained in AC 150/5340-30.

b.  When the purchaser specifies that a mounting system be provided, it
    must be per paragraphs 3.4.2.1 through 3.4.2.3.

#### Yield Device.

a.  Each elevated light fixture must have a yield point near the point
    or position where the light attaches to the base plate or mounting
    stake. The yield point must be no more than 1-1/2 inches (38.10 mm)
    above grade, must give way before any other part of the fixture is
    damaged, and must withstand a bending moment of 150 foot-pounds (203
    Newton-meters (N-m) without failure.

    1.  This yield point must also separate cleanly from the mounting
        system before the bending moment reaches 500 foot-pounds (678
        N-m). However, L-860 fixtures may bend instead of separating.
        The fixture must not sway more than 1 inch from vertical under
        the specified wind loading. If the yield device uses a threaded
        connection to the base plate or stake, it should have a male
        external thread with either 2 inch (50.80 mm)-11.5 National Pipe
        Thread (NPT) or National Pipe Straight (NPS) thread, or 1.5 inch
        (38.10 mm)-12 Unified Fine (UNF) thread. If threaded, the yield
        device must have a faceted surface, i.e., hexagonal section,
        below the yield point to facilitate removal. The yield device
        should be easily replaceable after breakage.

b.  For Mode 1 (series-powered) fixtures, the yield device must be
    hollow to allow a receptacle and socket to be positioned internally
    per paragraph 3.7.2. If the yield device is of the "pop-out" variety
    that may be reassembled after separation, the manufacturer must
    provide test data demonstrating the number of times the device may
    be separated before falling outside of the acceptable yield device
    performance band. This information must be included in the
    instruction manual.

c.  Nonmetallic yield devices must provide specified performance over
    the full temperature range with appropriate grounding capability for
    the attached fixture.

#### Yield Device for L-804.

a.  Each L-804 elevated light fixture must have a yield point near where
    the light attaches to the base plate. The yield point must withstand
    a bending moment of 1,300 foot-pounds (1,762.5 N-m) without failure,
    but must separate cleanly at the yield point before the bending
    moment reaches 2,100 foot-pounds (2,847.2 N-m).

b.  The center of the light source must not sway more than 2 inches
    (50.80 mm) from vertical under the specified wind loading.

c.  The yield point must not be more than 1.5 inches (38.10 mm) above
    grade and must give way before any other part of the fixture is
    damaged.

d.  The yield device must have a threaded connection to the base plate,
    with a male external thread with 2 inch (50.80 mm)-11.5 NPT or NPS
    threads.

e.  The yield device must have a feature below the yield point to
    facilitate removal of the yield device from the base plate. The
    feature may be either external or internal.

f.  The yield device must be easily replaceable after breakage.

g.  The yield device must be hollow to allow a receptacle and socket to
    be positioned internally per paragraph 3.7.2.

h.  Nonmetallic yield devices must provide specified performance over
    the full temperature range with appropriate grounding capability
    (see AC 150/5340-30 for details about grounding methods) for the
    attached fixture.

#### Base Mounting.

a.  When the elevated light fixture is mounted on an L-867 base, it must
    be mated with a base plate whose diameter and bolt-hole circle
    corresponds to one of the L-867 base sizes.

b.  The base plate must be designed to receive the frangible device
    provided; typically, this is a straight female thread.

c.  A neoprene gasket (or equivalent) must be provided with the base
    plate to form a watertight seal between the base plate and the L-867
    light base. This gasket must have a nominal thickness of 1/8 inch
    (3.16 mm) and must fit the bolt circle of the L-867 light base
    flange.

d.  When the base plate is bolted to an L-867 light base, it must
    withstand an evenly distributed static compressive load of 2,500
    pounds (1134 kg) and a bending moment of 2,500 foot-pounds (3,389.50
    N‑m) for the L-804 and 700 foot-pounds (949.07 N-m) for all other
    applications without damage or permanent deformation.

#### Stake Mounting.

When not installed on a base, the elevated light fixture must be mated
with a stake made of 2x2x3/16 inch (50.80x50.80x4.76 mm) steel angle
stock. The stake must have a fitting attached at the top to receive the
yield device. The length of the stake and fitting must be 30 inches
(762.0 mm). Alternate staking methods may be used if it can be
demonstrated that equal support and durability are provided. L-804
fixtures must not be stake mounted.

### L-804 Runway Guard Light.

a.  This fixture must consist of two alternately illuminated,
    unidirectional light sources. These light sources must be circular,
    8 inches (203.20 mm) in diameter, and in the same horizontal plane.
    Their spacing must be 15 inches (381.0 mm) center-to-center.

b.  The light sources must be alternately illuminated at the rate of
    45‑50 flashes per minute over all specified brightness levels.

c.  The front face of the fixture must consist of a minimum of 2 inches
    (50.80 mm) surrounding each light source which must be a low luster
    black finish (per paragraph 3.10.2).

d.  The fixture must be designed to reduce the amount of incident
    sunlight on the light emitting surface to maximize the contrast
    between the lamp-on and lamp-off states. This must be accomplished
    by providing one visor per light source. Each visor must extend 6.5
    inches (165.10 mm) from the front face of the fixture and must be
    installed no higher than 1.5 inches (38.10 mm) above the top of the
    light source. The bottom of the visor must extend at least 0.5 inch
    (12.7 mm) below the center of the light source. The visor is to be
    mounted in such a manner as to prevent light from escaping from the
    area where the visor attaches to the fixture. The visor must be
    tapered to the minimum necessary to not obstruct the level line of
    sight extending from the center of each light source to a horizontal
    angle of ±60 degrees while the fixture is aimed vertically at any
    angle between 0 and +20 degrees. All surfaces of the visors must be
    a low luster black finish (per paragraph 3.10.2).

e.  The center of the specified beam spread must be capable of being
    aimed vertically and horizontally. The fixture and/or the mounting
    system must be designed to permit vertical adjustment of the light
    beam from 0 degrees to +20 degrees above the horizontal. The
    adjustment mechanism must be detented in a minimum of 1 degree
    increments and must be able to be locked in place to hold the
    desired vertical setting.

f.  The mounting system must be designed to permit horizontal adjustment
    of the light beam through a range of ±20 degrees. The adjustment
    mechanism must be designed to provide horizontal aiming in
    increments of a maximum of 5 degrees.

g.  The fixture must be designed and installed so that jet blast does
    not turn the fixture either horizontally or vertically.

h.  A flexible corrosion resisting steel tether must be provided to
    prevent the fixture from being blown onto a neighboring runway or
    taxiway. The tether must have a minimum tensile strength of 6,800
    pounds (9,214 kg) and be designed to anchor the fixture to the L-867
    base. Approximately 6-10 inches (152.40-254.0 mm) of slack should be
    provided.

i.  All components required for installation must be supplied and all
    mounting legs must have yield devices as described in paragraph
    3.4.2.1.1.

## Structural Integrity.

The in-pavement light fixtures must withstand (without damage) the
mechanical stresses detailed below:

### Vibration.

In-pavement light assemblies must withstand vibration along any axis;
they must withstand an inertial load of up to 15 Gs when vibrated at
frequencies between 20 and 2000 Hertz (Hz). The lamp filament must
withstand an inertial load of 3 Gs when vibrated between 20 and 2000 Hz.

### Static Load.

When installed according to the manufacturer's recommendations, the
light assembly must withstand a static loading (in pounds) of 450 times
the top area of the light fixture (in square inches) distributed
uniformly over the top surface.

### Shear Load.

The light assembly must withstand a shear load of 3,000 pounds (1,360.78
kg) applied to the top of the light in any direction parallel to the
mounting surface.

### Hydraulic Impact.

The top of the light assembly (all surfaces exposed when properly
installed) must withstand a momentary hydraulic pressure of 200 psi
(1,378.90 kilo-Pascals (kPa)).

### Mechanical Impact.

For L-850 lights, the light assembly must withstand the repeated impact
of a steel ball with 29.5 foot-pounds (40 Joules) of energy.

### Leakage Resistance.

The subassembly containing the optical components, including the lamp,
must be resistant to water leakage or infiltration from above or below
the light fixture. Specifically, the optical assembly must withstand an
internal pressure of 20 psi (137.90 kPa) without leakage.

### Surface Temperature.

The light fixture must be designed so that the surface temperature will
not exceed 320 degrees F (160 degrees C) when the fixture is operating
at maximum intensity while covered by the wheel of a heavy ground
vehicle or aircraft for a period of 10 minutes.

## Drainage.

### Elevated Lights.

Elevated light fixtures must be constructed so that a tight seal is
formed between the components. A gasket must be used between the fixture
cover and body to improve the seal. The fixture must be constructed so
that any water developed internally will drain down past the yield
point. The L-804 fixture may use a drain hole rather than drain down the
mounting legs. The design should not allow water build-up around the
yield point.

### In-pavement Lights.

a.  Class 2 light fixtures must be designed for either a "dry" or "wet"
    system. A "wet" system requires the light installer to supply
    sufficient drainage in the base/conduit system to allow the light
    fixture to drain into the base.

b.  In a "dry" system, no water drains from above the light into the
    base. The optical assembly must be sealed from above and below.
    "Dry" systems may use an "O" ring (supplied with the base) in the
    mounting flange of the base to improve sealing; flat gaskets must
    not be used at this interface.

c.  For "wet" systems, water from the channel in front of the optical
    window and any associated recessed areas may be drained into the
    base to prevent water from obstructing the light beam.

d.  If part of the optical window is below grade, the light fixture must
    emit at least 50 percent of the specified light output when that
    portion of the window below grade is blocked. For designs that have
    more than half the window below grade, the fixture must emit 50
    percent intensity with the lower half of the window area blocked.

## Electrical Requirements.

a.  The L-804 light fixture must have monitoring capability to detect
    failures as defined below.

b.  All L-862 and in-pavement light fixtures must use a Mode 1 (constant
    current) power supply of 6.6 amperes.

c.  All L-860 light fixtures must use a Mode 2 (constant voltage) power
    supply; the L-861 and L-804 light fixtures may be either Mode 1 or
    Mode 2.

d.  Mode 1 fixtures must be designed to interface with an isolation
    transformer (specified in AC 150/5345-47) and must be compatible
    with all certified L-828 constant current regulators and monitors.

e.  The names and addresses of certified regulator manufacturers may be
    found in AC 150/5345-53 Addendum. Upon request, they will provide
    oscilloscope photographs of the constant current regulator's output
    waveform per AC 150/5345-10.

### In-pavement Lights.

a.  The light fixture must have a minimum insulation resistance of 50
    meg-ohms lead-to-case when dry or while soaking in salt water.

b.  Leads must be stranded copper insulated with a material suitable for
    the electrical and temperature requirements, and must be at least 18
    inches (457.20 mm) long. Leads for Class 2 fixtures must be
    terminated with an L-823 plug (specified in AC 150/5345-26) to mate
    with the socket on the secondary lead of an isolating transformer.
    Leads for Class 1 light fixtures must be sealed at the entry to the
    fixture and must have the ends ready for splicing.

c.  Moisture must not wick into the fixture through the leads.

### Elevated Lights. 

a.  The light fixture must have a minimum insulation resistance of 50
    meg-ohms lead-to-case.

b.  A lead assembly of appropriate length must be supplied to connect
    the lamp socket to the power source. Two stranded copper conductors
    must be provided, with adequate current capacity and insulation for
    the operating environment.

c.  A clamp or similar device must prevent any strain or tugging on the
    lead from affecting the lamp socket.

d.  All wiring must be run internally; L-860 fixtures may use external
    wiring if desired.

e.  At the yield point on elevated lights with frangible or "pop-out"
    devices, the electrical circuit must have a means of disconnecting
    (such as a plug and receptacle) to break the electrical circuit and
    allow the light fixture to separate cleanly.

#### Mode 1(Series-Powered) Fixtures. 

On Mode 1 fixtures, the receptacle leads must be terminated in an L-823
plug. This plug mates with the receptacle on the secondary lead of an
isolating transformer. The mounting system (either base plate or stake)
must firmly position this isolating transformer receptacle so its mating
face is at the yield point and so it will not be dislodged by separation
from the plug. Drainage must be provided around the receptacle retainer
to prevent water buildup around the yield point (per paragraph 3.6.1).

#### Mode 2 (Parallel-Powered) Fixtures.

The lead from the lamp socket to the underground power cable must be
provided with a disconnect device at the yield point of the fixture. For
L-860 fixtures with flexible mounting systems or external wiring, the
disconnect device may be at any convenient point. The lead must be
secured so that no strain is placed on the primary power cable when the
disconnect device is pulled apart by the separation at the yield point
of the light fixture. When the disconnect device is separated, the
energized leads from the power cable must not be exposed.

### L-804 Runway Guard Light Fixture.

The L-804 fixture may be designed to accept a Mode 1 or Mode 2 power
supply. The power input cable must have sufficient length to reach at
least 6 inches (152.40 mm) below grade when installed, and must have
provision for strain relief. The power input cable must terminate in a
plug; for Mode 1 circuits, this must be an L-823 plug. Plugs and
receptacles for Mode 2 circuits must be of good quality, weatherproof,
and suitable for direct burial. If a standard L-823 plug is not used,
the mating receptacle for the plug must be provided for field
installation.

#### L-804 Flasher.

The two lights in the runway guard fixture must be alternately
illuminated 45 to 50 times a minute per lamp over all specified
brightness levels. The flashing mechanism used to switch the two lights
must maintain the flash rate within tolerance under the specified
environmental conditions. If required, filters must be included to
suppress electromagnetic interference (EMI). See AC 150/5340-30,
Appendix 2, *AIRPORT TECHNICAL ADVISORY*, for additional information
about EMI effects and mitigation strategies. Power must be applied
alternately to each lamp for 50 percent (± 0.5 percent) of the total
cycle. When operating on the highest intensity setting, the light output
for each lamp must rise to at least 70 percent of the steady-burning
intensity for that lamp during the "on" cycle, and must fall to 17
percent (or less) of the steady-burning intensity during the "off"
cycle.

#### L-804 Component Failure.

When a lamp failure occurs, the remaining lamp must continue to flash
normally. When flasher failure occurs, at least one of the lamps must
remain "on" at the selected intensity. See AC 150/5345-26, *Maintenance
of Airport Visual Aid Facilities,* for tolerance/limits and operating
standards.

#### L-804 Control.

One of two methods may be used to control the brightness of the L-804.
One method is to allow the lamp intensity to vary with the current
delivered to the fixture via a series circuit (mode 1). Depending on the
regulator used to energize the circuit, this current may vary from 4.8
to 6.6 amps or from 2.8 to 6.6 amps. The other method, when using 120 or
240 volts ac (mode 2), is to use a photocell to switch the lamps to
30 percent intensity at low light levels. The photocell must turn the
fixture to high intensity when the light falling on it reaches 50 to 60
foot-candles, and low intensity when the light falling on it reaches 25
to 35 foot-candles. A time delay must be incorporated to prevent mode
switching due to transient light conditions.

#### Mandatory L-804 Monitoring.

Monitoring must detect the failure of a lamp(s), failure of a lamp(s) to
flash, and failure of the monitoring device. An option may be provided
for an L-804 without monitoring, however this option must only be
derived by removal of components from the fixture and/or replacement of
power/control lead cabling. For the purpose of providing this monitoring
function with a single support leg for breakaway for Mode 1 circuits,
use of multiple pin/plug connector that is not a L-823, is acceptable
until such time as an appropriate L-823 connector is available. In this
situation, the mating connector must be furnished with the fixture. The
connector design should meet environmental concerns, electrical
concerns, and separation criteria intended of an L-823 connector.
Connection to the isolation transformer must be with L-823 plug for Mode
1 circuits.

## Optical Requirements.

The internal components of the optical assembly must be protected from
dirt, corrosion, humidity, or other environmental factors that might
degrade performance. Reflectors must have a finish of high specular
reflectivity. All light transmitting surfaces must conform to
MIL-C-7989B, Class B, C, or D. Covers must resist abrasion or other
damage from sandblasting, sunlight, and chemicals in the air. A durable
permanent label with replacement lamp identification data must be placed
in the fixture near the lamp. Lamps for the Type L-850, L-862, L-861SE,
and the L-852 E, F, S, and G lights must have a minimum rated life of
500 hours; all others must have a minimum rated life of at least 1,000
hours.

## Maintainability Requirements.

a.  All interior components of the light fixture must be easily
    removable for cleaning or replacement.

b.  The optical components must be keyed so that they may not be
    reassembled incorrectly.

c.  The lamp must be accurately and firmly positioned at the proper
    focal point.

d.  Any interior lenses or filters must be securely positioned.

e.  After the light fixture has been reassembled, all components must be
    properly aligned, original water resistance must be restored, and
    the required photometrics must be produced.

f.  Special tools (tools that are not commercially available) must not
    be required for maintenance.

g.  Directional light fixtures must be marked to indicate the correct
    orientation with respect to the runway centerline.

h.  Elevated fixtures with exposed metal parts that might present a
    shock hazard must be grounded.

i.  The fixture must be permanently marked with the manufacturer's name
    and the fixture type.

j.  For L-861 and L-862 fixtures, at least 4 degrees of adjustment must
    be provided in all directions to allow leveling of the fixture after
    installation.

k.  For in-pavement lights, a fitting must be supplied to allow
    pressurization of the sealed optical assembly. The fitting may be
    permanent, or a plug for installation may replace it. This fitting
    will be used to test the seals after field maintenance.

l.  Pry slots, threaded holes, or other means must be supplied on the
    top of in-pavement lights and elevated light base plates to assist
    in removing stubborn fixtures adhering to the mating surfaces.

## Materials and Finish.

All components must be suitable for the intended purpose and adequately
protected against corrosion. The components must have adequate capacity
and must not be operated in excess of the component manufacturer's
recommended rating.

### In-pavement Lights.

#### Hardware.

a.  All bolts, studs, nuts, lockwashers, and other similar fasteners
    used in the light fixture must be fabricated from either 18-8, 410,
    or 416 stainless steel, passivated and free from discoloration.

b.  Bolts or screws made of 410 or 416 stainless steel must be given a
    black oxide finish per MIL-DTL-13924C, Class 3.

c.  The manufacturer should recommend use of an anti-seize compound when
    providing 18-8, 410, or 416 stainless steel hardware. The
    manufacturer does not normally supply anti-seize compound.

d.  All screw threads must be Class 2 or Class 3 per ANSI B1.1. This
    paragraph does not apply to current-carrying components.

#### Finish.

All surfaces of the finished top assembly must be smooth, without burrs
or sharp edges. Any "O" ring grooves must have a surface finish of 64
rms maximum as defined in ANSI B46.1. In addition, all edges above the
pavement must be rounded to not less than 1/16-inch (1.59 mm) radius.
The surface on the light fixture that mates with the base flange must
have a smooth finish to provide good load transfer and sealing.

#### Elevated Lights. 

#### Protection of Metals.

Ferrous metals must be galvanized or given other equal corrosion
protection. Copper bearing hardware in contact with aluminum must be
plated with nickel or zinc.

#### Finishes.

For non-optical surfaces, the exterior finish must match color No.
13538, Aviation Yellow, Table V of FED-STD-595B unless otherwise
specified.

#### Metal Part Coatings.

Metal parts must be protected by at least one prime coat (or other
suitable preparatory painting process) and one finish coat. Paint for
the finish coat must be high quality paint suitable for the drying
process used. Paint for the prime coat must be suitable for the metal
treatment involved.

**NOTE:** *Powder or other coatings may be substituted for paint if
equivalent environmental stresses, corrosion protection, metal treatment
compatibilities, and color (per paragraph 3.10.1.5) properties are
provided.*

#### Nonmetallic Parts.

Nonmetallic parts must have the color integral to the material or must
be protected by a finish coat of paint suitable for the drying process
and compatible with the material. The finish must be able to endure the
environmental stresses specified in paragraph 3.2 for a suitable period.

## Instruction Manual.

An instruction manual must be included with each order and must contain
at least the following information:

a.  Diagram showing layout of parts and wiring;

b.  Complete parts list with the names and addresses of the component
    suppliers and their part numbers;

c.  Assembly and installation instructions, including dimensions of any
    pavement cuts, recommended torques, and special mounting
    requirements;

d.  Maintenance instructions, including durability information on
    "pop-out" yield devices for elevated lights.

## Optional Items.

### Option 1 - Lamp Bypass.

For in-pavement lights installed on series circuits, an electrical
bypass device may be available for specification by the purchaser. This
device must close an auxiliary circuit around the lamp within 15 seconds
after failure of the lamp. A film disc cutout or other suitable device
may be used for this function. A suitable holder and bypass wiring must
be furnished for this device.

### Option 3 - Shields.

For elevated lights, except for L-804, the manufacturer may provide
shields to eliminate unneeded light. These shields are attached after
the fixture is in place and are oriented according to the needs of a
particular installation. All shields are subject to the same wind
loading and other environmental requirements as the fixture to which
they attached.

### Option 4 - Mounting Hardware.

The manufacturer must provide the type of mounting system specified by
the user of the elevated lights. The user may specify a base plate,
stake, or may purchase the light without mounting hardware. The user may
also order elevated fixtures of a specified height. If a mounting system
is provided, it must meet the requirements of paragraph 3.4.2 and
subparagraphs.

### Option 5 - Two Lamps for Bidirectional Taxiway Centerline Fixtures.

For taxiway centerline fixtures, L-852, the manufacturer may provide
bidirectional fixtures with two lamps, one for each direction, that are
independently controllable with separate external leads.

**Intentionally left blank.**

# CHAPTER 4. QUALIFICATION REQUIREMENTS.

## Qualification Request.

Procedures for obtaining qualification approval are contained in the
latest edition of AC 150/5345-53.

## General.

Each type, class, mode, option, and style of light fixture to be
approved must be tested. Only one set of mechanical tests is required
for each light fixture structural design.

## Photometric Testing.

a.  The optical performance of each light fixture, in combination with
    different lamp manufacturers, wattages, types, etc. must be
    determined by photometric measurements.

b.  Additionally, each light fixture must have light output verified for
    each filter, lens, and light cover intended for use.

c.  All lamps must be steady-burning during photometric testing.

d.  All in-pavement fixtures tested must be mounted on a facsimile that
    simulates the below grade requirements per paragraph 3.4.1.2e.

### Procedures.

a.  Before testing, photometric test equipment must be calibrated per
    paragraph 6 of IES LM-35. The photometric axes are established in
    relation to a properly installed fixture; the horizontal axis passes
    through the center of the fixture and is parallel to the runway
    centerline (for in-pavement lights it is at grade), and the vertical
    axis runs through the center of the fixture and is perpendicular to
    the ground plane. Horizontal angles toward the runway centerline are
    positive.

b.  The fixtures must be operated for at least 15 minutes before taking
    measurements. Photometric measurements must be taken with at least
    five random production-run lamps.

c.  For fixtures with a 10 percent ellipse specified in Tables 1 through
    3, at least 8 points must be measured on this ellipse. The method of
    measurement required to demonstrate compliance with the
    specification is given below.

#### Narrow-Beam Fixtures.

For fixtures with a horizontal main beam width specified less than or
equal to ±10 degrees, intensities must be measured along the horizontal
and vertical axes at intervals of a maximum of 1 degree - a minimum of
ten readings on each axis must be taken. The average value of each axis,
per paragraph 4.3.3, must meet the minimum average intensity
requirements contained in Tables 1 and 2. Additionally, each intensity
reading must be at least one-half the specified value for the minimum
average intensity requirement. For the L-850E, each reading must equal
or exceed the minimum intensity.

#### Wide-Beam Fixtures.

a.  For fixtures with a horizontal beam width greater than 20 degrees
    but less than 180 degrees, horizontal "cuts" must be taken to
    measure the light intensity at each one degree interval throughout
    the required vertical beam spread.

b.  At least 10 readings must be taken at each horizontal "cut." The
    results of these horizontal "cuts" must be averaged collectively,
    per paragraph 4.3.3, and this average must meet the minimum average
    intensity requirements contained in Tables 1 and 2.

c.  Additionally, each of the intensity readings taken in a horizontal
    "cut" must be at least one-half the specified value for the minimum
    average intensity requirement.

d.  The full measurements must be taken with at least one lamp, and the
    other four may be submitted with a single representative horizontal
    "cut." However, additional data may be required on the other lamps
    to ensure compliance.

#### Omnidirectional Fixtures.

a.  For fixtures with a specified horizontal beam width greater than 180
    degrees, the vertical beam spread must be measured at least every 30
    degrees of the horizontal beam width.

b.  Each reading must meet the minimum intensity requirement, and the
    average of each vertical "cut" must meet the minimum average
    intensity requirement contained in Tables 1 and 2.

c.  Additionally, each of the intensity readings taken in a vertical
    "cut" must be at least one-half the specified value for the minimum
    average intensity requirement.

d.  For in-pavement lights, a 25 percent intensity reduction may occur
    at structural ribs with the exception of L-852T fixtures.

### Chromaticity.

a.  Each fixture must be tested with each type of filter, lamp, and
    optical system to be used in the fixture to ensure that it meets the
    intensity and chromaticity requirements.

b.  Spectral transmittance measurements of the filter are at the
    operating temperature of the light fixture.

c.  The fixture must meet the chromaticity requirements of SAE-AS25050
    and the ITE Equipment and Material Standard, ST-017B, Chapter 2,
    *Vehicle Traffic Control Signal Heads*, when tested at full
    brightness and at the center of the main beam and the extremes of
    the horizontal and vertical beam distribution. Chromaticity outside
    of distribution boundaries may be verified visually.

**NOTE:** *The ITE Standard applies to Type L-852G and L-852S inset
light fixtures (see note (g) in Table 1) and Type L-862S and L-804
elevated light fixtures (see note (g) in Table 2).*

### Calculations.

The average measured intensity may not be more than three times the
specified average intensity. For fixtures with a minimum but no average
intensity requirement, the measured minimum may be no more than three
times the specified minimum intensity. Bi-directional and split color
fixtures are exempt from this requirement if a single light source is
used.

### Special Conditions - In-pavement Lights.

For in-pavement lights, photometric tests must follow the shock and
hydraulic impact tests to determine if the lamp filament has sustained
any damage. If an in-pavement light is designed so that any portion of
the exterior lens or prism is below pavement level, that portion must be
obscured by opaque tape, but no more than half the lens area should be
blocked. The resulting intensity distribution, in the applicable color,
must be no less than 50 percent of that required in Tables 1, 2, or 3.
The center of the light beam may be shifted ±0.5 degree vertically, and
±1.0 degree horizontally, to meet the photometric curve. Type L-852B and
D fixtures may be shifted ±2.5 degrees horizontally.

### Special Conditions - Elevated Lights.

The resultant isocandela curves may be shifted a maximum of one degree
horizontally and one degree vertically to achieve compliance with the
specified photometric curve. For L-804 fixtures, the flasher must be
disabled and each light measured independently while steady-burning.

### L-804 Flash Intensity Ratio Test.

The L-804 Runway Guard Light must be operated while flashing for a
period of 30 minutes. A peak value reading must be taken, with a photo
detector with an adequate response time, in the center of the beam and
recorded. The flasher mechanism must then be disabled. After a five
minute re-warm period, a steady state reading must be recorded. The
ratio of the peak reading to the steady state reading must meet the
requirements of paragraph 3.7.3.1.

## Load Test.

a.  A static load test must be performed on the complete in-pavement
    light fixture (and a shallow base or L‑868 facsimile) and on the
    elevated light base plate. The base plate must be mated to an L-867
    base (or equivalent) for testing.

b.  The test load must be applied to the top part of the test assembly
    through a rubber block of a diameter at least 1 inch (25.40 mm) less
    than the outside diameter of the light assembly. The rubber block
    must be 1 inch (25.40 mm) thick and have a "Shore A" hardness of
    55-70.

c.  For in-pavement light fixtures, the total load (in pounds) to be
    applied must be 450 times the area (square inches) of the light
    fixture.

d.  For base plates, the load must be 2,500 pounds (1,133.98 kg). The
    load must be applied uniformly over the rubber at a rate not greater
    than 10,000 pounds (4,535.92 kg) per minute; full load must be
    applied for at least 1 minute. When the base plate is bolted to an
    L-867 light base, it must withstand a bending moment of 2,500 foot
    pounds (3,389.50 N-m) for the L-804 and 700 foot pounds (949.07 N-m)
    for all other applications.

e.  The test is considered unsatisfactory if there is any permanent
    deformation, cracking of material or finish, breaking, or damage to
    any part of the light, base assembly, or base plate.

## In-pavement Light Fixture Testing.

Unless otherwise noted, the in-pavement light fixtures must be tested
under simulated installed conditions. Class 1 lights must be tested with
any shallow base or other accessories used for installation. Class 2
lights must be tested while attached to an L-868 base or facsimile.

### Mechanical Tests.

#### Vibration Test.

a.  The light fixtures must be subjected to a sinusoidal vibration along
    three mutually perpendicular axes (parallel to the centerline,
    perpendicular to the centerline, and vertically).

b.  The test must be conducted in two parts; the second part is only
    necessary if the lamp is damaged during the first part.

    1.  For the initial test, the lamp must be shunted and the
        continuity continuously monitored. The fixture must be vibrated
        over a frequency range of 20 to 500 Hz, with a maximum
        acceleration of 10 Gs.

    2.  The fixture must then be vibrated from 500 to 2,000 Hz, with a
        maximum acceleration of 15 Gs. The duration of each sweep must
        be 10 minutes.

    3.  After vibrating, the light fixture must be inspected. Mechanical
        failure of any component, loosening of any part or fastener,
        loss of continuity during testing, or any discernible movement
        of lamps in lamp holders during the test is cause for rejection.
        If the lamp is damaged, it must be replaced, the shunt removed,
        and the test rerun, with the maximum G loading being 3 Gs. After
        performance of the second test, breakage of the lamp filament
        and/or envelope is cause for rejection.

#### Shock Test.

a.  For L-850 type light fixtures, the assembled unit must be mounted
    rigidly on either a 1-inch thick (25.40 mm) steel plate or a 4-inch
    (101.60 mm) or thicker concrete base. The dimensions of the steel or
    concrete base must be at least 3×3 feet (0.91×0.91 m).

b.  The light fixture must be turned on at full brightness for at least
    2 hours prior to starting the test. With the light still on at full
    brightness, a case hardened steel ball weighing 5 pounds (2.27 kg)
    must be dropped on the center of the top of the light fixture from a
    height of 6 feet (1.83 m), 10 times with a 5-minute interval between
    each drop. Upon conclusion of the test, the light fixture must be
    opened to determine if the optical assembly has been damaged or any
    component displaced. Any evidence of damage inclusive of lamp and
    filament is cause for rejection.

#### Horizontal Shear Test.

This test simulates the shearing load applied to the top of any
in-pavement fixture by a braking aircraft tire.

a.  A bar must be attached (welded) to the top of the fixture so it is
    parallel to the runway centerline when the light is installed.

b.  The ends of the bar should extend beyond the edges of the fixture to
    facilitate loading.

c.  The light fixture, attached to a base receptacle or facsimile, and
    torqued to manufacturer's specifications, must be installed in a
    press with the attached bar in line with the piston of the press.

d.  A load of 3,000 pounds (1,360.70 kg) must be applied to the end of
    the bar by the press. The load must be applied and release 20 times
    to each end of the bar.

e.  Any structural damage, movement of any part, or loosening of
    fasteners must be cause for rejection.

### Thermal Tests.

#### Low Temperature Test.

a.  The light must be totally immersed in water.

b.  While immersed, the fixture must be subjected to a low temperature
    of -40 degrees F (-40 degrees C) for 24 hours.

c.  The cold soak must be followed immediately by operation at rated
    current for 30 minutes or until free from ice, whichever comes
    first. This must be repeated for a total of three cycles.

d.  Any evidence of damage must be cause for rejection.

#### Cycling and Thermal Shock Test.

a.  The light fixture must be subjected to an on-off cycling test by
    operating the unit at rated current at room temperature (dry) for
    not less than 4 hours.

b.  The fixture must then be de-energized and immediately submerged
    under at least 1 foot (304.80 mm) of water for at least 4 hours. The
    temperature of the water before submersion of the fixture must be 41
    degrees F (5 degrees C) or lower. This cycle must be repeated a
    total of three times, and the fixture must be immediately inspected
    at the completion of the third cycle. Any evidence of glass breakage
    or lens damage, any leakage of water into the optical assembly, or
    damage to any part of the fixture must be cause for rejection.

#### Surface Temperature Test.

a.  Tests must be conducted to demonstrate that the maximum temperature
    on top of the inset light does not exceed 320 degrees F (160 degrees
    C), when the light is covered with the tire of a heavy ground
    vehicle of at least 6,000 pounds (2721.50 kg) gross vehicle weight
    (GVW) rating for a period of 10 minutes.

b.  Before this 10-minute test period, the light unit must be operated
    at high intensity for at least 2 hours in still air with an ambient
    temperature of at least 77 degrees F (25 degrees C). The fixture
    must use the lowest transmissivity filter to be qualified. The
    thermocouple must be located between the hottest point of the
    fixture and the tire to register the test temperature.

### Water Tests.

#### Hydraulic Impact Test.

a.  Fort in-pavement type light fixtures, the light assembly must be
    submerged in water to a depth of approximately 1/2 inch (12.70 mm).

b.  The upper surfaces of the light fixture around the windows must be
    encased in a leak-proof metal housing with a 1-3/4 inch (44.45 mm)
    diameter steel piston.

c.  The chamber must be filled with water and purged of all air.

d.  A 5-pound (2.27 kg) steel ball must be dropped from a height of 6
    feet (1.83 m) onto the piston.

e.  The light must not have any mechanical failure, optical damage, or
    water penetration into the optical cavity after this test has been
    repeated five times.

#### Leakage Test.

a.  This test must be performed after the assembled light unit has
    successfully passed the vibration test, impact test, hydraulic
    impact test, and load test.

b.  Prior to performing this test, the wire leads must be subjected to a
    30-pound (13.61 kg) tension for 5 minutes to test the integrity of
    the seal where the leads enter the fixture.

c.  The entire assembly must then be submerged in water at least 3
    inches (76.20 mm) below the surface, subjected to an internal air
    pressure of 20 psi (137.90 kPa) and maintained for a period of 10
    minutes.

d.  Any leakage must be cause for rejection. Leakage tests on production
    units may use this method, a gas leak detector, or other approved
    method to ensure that the optical assembly is watertight.

### Accelerated Life Test.

a.  An accelerated life test must be performed on in-pavement light
    fixtures.

b.  The light fixture must be set in dry sand and stabilized to a
    temperature of at least 131 degrees F (+55 degrees C), simulating
    its installation in pavement. The sand must be at least 5 inches
    (127.00 mm) thick around the sides and bottom of the light assembly.
    The sand must fill any openings in the light assembly that would be
    below pavement level. Only Class 2 fixtures must be mounted to a
    standard L-868 base that is buried in sand.

c.  The unit must be operated for at least one-half the minimum rated
    lamp life at rated current. Light units supplied with filters should
    have the lowest transmissivity filter in place during this test.
    After this, all sand must be removed and the photometric performance
    of the unit must be measured per paragraph 4.3. Intensities must not
    be less than 80 percent of the intensities specified in the
    appropriate table.

d.  After this test, the light assembly must be taken apart and
    thoroughly examined. Any deformation, blistering, evidence of heat
    damage, or corrosion must be cause for rejection.

### Insulation Resistance Check.

The fixtures must be subjected to a 500-volt insulation resistance test
(lead-to-case). The initial resistance must be at least 50 meg-ohms. The
light assembly must then be operated for 1 hour at rated current and
must be immediately submerged in a saturated salt-water solution except
for the ends of the leads. The resistance test must be repeated.
Resistance must be at least 50 meg-ohms.

### Protective Plating Test.

Zinc plating must be tested by the appropriate method described in ASTM
B 633.

## Elevated Light Tests.

### High Temperature Test.

a.  A high temperature test must be conducted per MIL-STD-810F, Method
    501.4, Procedure II.

b.  The equipment must be subjected to 3 cycles according to Table
    501.4-II except that the temperature must be adjusted upward so that
    the maximum is 131 degrees F (55 degrees C).

c.  The fixture must be installed in a normal operating configuration
    and must be operated throughout the test.

d.  Any deterioration in the materials or performance is cause for
    rejection.

e.  This test must be run with the highest wattage lamp and lowest
    transmissivity filter to be qualified.

f.  A separate test must be run to demonstrate the performance of any
    nonmetallic yield device at high temperature.

### Low Temperature Test.

a.  A low temperature test must be conducted per MIL-STD-810F, Method
    502.4, Procedure II.

b.  The fixture must operated and then cold soaked (fixture off) at the
    storage/shipping temperature (-67 degrees F (-55 degrees C) for one
    hour. The test chamber must then be ramped to the ‑40 degree F (-40
    degree C) equipment operating temperature at no more than 6 degrees
    F (3 degrees C) per minute to prevent thermal shock to the
    equipment.

c.  With input power off, the fixture must be exposed to a 24-hour
    soaking period at -40 degrees F (-40 degrees C). After the cold
    soak, the fixture must be energized.

d.  Any deterioration in materials or performance is cause for
    rejection.

e.  A separate test must be run to demonstrate the performance of any
    "pop-out" or nonmetallic yield device at low temperature.

### Rain Test.

A rain test must be conducted per MIL-STD-810F, Method 506.4, Procedure
I, Rain and blowing rain, with a rain rate of 5.2 inches/hr (132.08
mm/hr). The test duration must be 30 minutes per side. Any leakage of
water into the lamp body must be cause for rejection.

### Salt Fog Test.

If the fixture has external metal components, a salt fog test must be
conducted on the assembled light fixture per MIL-STD-810F, Method 509.4.
Any evidence of damage, rust, pitting, or corrosion is cause for
rejection.

### Yield Device.

a.  All tests, demonstrating compliance to the requirements of paragraph
    3.4.2.1 (3.4.2.1.1 for L-804) must be performed with the light unit
    fully assembled at nominal height (14 inches or 355.60 mm) and
    mounted to a rigidly secured base plate.

b.  The load must be applied to the body at a point just below the lens,
    no faster than 50 pounds (222.41 N) per minute until the minimum
    bending moment of paragraph 3.4.2.1 (3.4.2.1.1 for L-804) is
    achieved.

c.  After it has been determined that the light unit will sustain this
    load without damage, the loading must continue at the same rate
    until yielding at the yield point occurs.

d.  For "pop-out" or other friction-type devices, the test must be
    repeated 10 times on the same device to check for loosening of the
    attachment.

e.  The test must be repeated on five frangible fittings. Temperature
    tests for nonmetallic yield devices must also be conducted at -40
    degrees F and 131 degrees F (-40 degrees C and +55 degrees C (±15
    degrees)).

f.  Failure of any of the devices to meet the requirements of paragraph
    3.4.2.1 (3.4.2.1.1 for L‑804) or damage to any part of the light
    unit before the yield device gives, is cause for rejection. For
    friction type devices, the manufacturer must provide data on how
    many "pop-outs" may be expected before the device falls below the
    minimum yield value.

### Solar Radiation Test.

A sunshine test must be conducted per MIL-STD-810F, Method 505.4,
Procedure II, Steady state (actinic effects), for all light fixtures
with nonmetallic non-glass exterior parts. The material must be
subjected to a minimum of 56 cycles. At the conclusion of the test, any
evidence of deterioration or alteration of the light fixture is cause
for rejection. For plastic optical lenses or covers, the photometric
performance must be measured after this test. Certification from the
plastic manufacturer that the material has previously passed this test
may be provided in lieu of performing the test.

### Wind Test.

The manufacturer must demonstrate (by wind test or static loading) that,
when subjected to the wind requirements in paragraph 3.2, no part of the
light, mounting system, or yield device is damaged, and the light does
not sway more than 1 inch (25.40 mm) with exception of L-804 that must
not sway more than 2 inches (50.80 mm). If a light for snow areas is
offered (paragraph 3.4.2), it must also be wind tested. No plastic
deformation must result from the wind-loading test.

### Certification.

The manufacturer must furnish a certification from the lamp manufacturer
that the proposed lamp will meet the lamp life requirements. Evidence
must be submitted that the lens conforms to the requirements of
paragraph 3.8.

### L-804 Operational Test.

An operational test, using the appropriate electrical power mode, must
be conducted on the L-804 to demonstrate flash rate, flash duration,
intensity control, vertical adjustment, and any other required
operational features inclusive of visual verification of tethering
device attachment.

### Elevated Light Insulation Test.

The fixtures must be subjected to a 500-volt insulation resistance test
(lead-to-case). The initial resistance must be at least 50 meg-ohms. The
light assembly, must then be operated for 1 hour at rated current and
retested - resistance must be at least 50 meg-ohms.

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# CHAPTER 5. PRODUCTION TESTING.

## Testing.

a.  Each fixture must be energized and visually inspected for proper
    operation.

b.  The optical assembly of all in-pavement fixture must be pressurized
    internally to 20 psi (137.90 kPa) and tested for leaks.

c.  A sampling of all in-pavement and elevated fixtures must be
    subjected to the photometric tests.

d.  In the photometric tests, the fixtures must meet the requirements of
    paragraph 3.3.

e.  For conventional testing, sampling is defined by ANSI/ASQ Z1.4-1993,
    Inspection Level II, Acceptance Quality Level (AQL) 2.5. For
    Statistical Process Control (SPC) systems, sampling must be per
    ANSI/EIA557 and must show statistical capability with a Cpk\>1.0 and
    σ\>3.0.

f.  If abbreviated photometric test methods are used for production
    testing, these methods must have prior approval by the certifying
    agent.

## Production Test Records.

Records showing actual test results of all tests required by paragraph
5.1 must be maintained for three years by the manufacturer. All records
must be traceable to the units tested by serial number or test lot.

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