1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA LE 5A-1999Procedure for Determining Luminaire Efficacy Ratings for Commercial, Non-residential Downlight LuminairesPublished by: STD.NEMA LE 5A-ENGL 1999 6470247 0516235 353 NEMA STANDARDS PUBLICATION LE SA-1999 Procedure fo
2、r Determining Luminaire Efficacy Ratings for Commercial, Non-residential Downlight Luminaires National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, Virginia 22209 Copyright 1999 by the National Electrical Manufacturers Association. All rights including translation
3、 into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. I Clause Section 1 1.1 1.2 1.3 Section 2 2.1 2.2 2.3 Section 3 3.1 3.2 Section 4 4.1 4.2 4.3
4、 Section 5 5.1 5.2 Section 6 6.1 6.2 Section 7 7.1 7.2 STD.NEMA LE 5A-ENGL 1999 b470247 051b23b 29T CONTENTS LE 5A-1999 Pagei Page Foreword . iii Purpose . iv GENERAL . 1 Scope 1 Referenced Documents 1 Definitions . 2 SELECTION OF COMPONENTS 5 Test Specimen-Luminaire 5 Test Specimen(s)-Compact Fluor
5、escent and HID Ballasts 5 Test Specimen(s )-Compact Fluorescent Lamps, Incandescent Lamps, HID Lamps . 5 TESTING FACILITIES AND EQUiPMENT . 7 Facilities 7 General Criteria 7 CALCULATIONS 9 Luminaire Efficacy Rating-Downlight Luminaires . 9 Calculation of Ballast Factor for Compact Fluorescent Lamps
6、9 Ballast Factor for HID Ballasts 10 PROCEDURES 11 Luminaire Efficacy Rating-Oownlight Luminaires . 11 Luminaire Category and Classification . 11 LIGHTING ENERGY COST -DOWN LIGHT LUMINAIRES 13 Comparative Yearly Energy Cost of Light . 13 Calculation: Comparative Yearly Lighting Energy Cost . 13 RECO
7、MMENDED REPORTING CATEGORIES AND FORMAT 15 Category Description 15 Recommended Reporting Format (Example Only) 15 I I STD.NEMA LE 5A-ENGL 1999 b470247 051b237 12b LE 5A-1999 Pageii AnnexA A.1 A.2 A.3 A.4 RATIONALE FOR DOWNUGHT LUMINAIRE LER. 17 Luminaire Characteristics . 17 Ballast Factors 17 Lumin
8、aire Efficiency 17 Luminaire Wattage . 17 STD.NEMA LE 5A-ENGL 1999 6470247 0516238 062 FOREWORD LE 5A-1999 Page iii This Standards Publication was developed to assist the federal government, state governments, electric utilities, and manufacturers of luminaires in performing a standardized test meth
9、od for determining the luminaire efficacy rating of incandescent, compact fluorescent, and low wattage 15Ow) high intensity discharge down light type luminaires incorporating various shielding media and various types of applicable lamps and ballasts where applicable. This Standards Publication was p
10、rompted by the need of the luminaire manufacturing industry to have a uniform method of determining energy effiCiency of their products using various components. It is not the intent of this Standards Publication to inhibit luminaire design or to impose arbitrary tolerances on any luminaire manufact
11、urer. The International Association of Lighting Designers and the Illuminating Engineering Society of North America desire to include, in the future, an additional numerical value for lighting quality to accompany the luminaire efficacy rating value. This numerical expression for lighting quality ha
12、s not yet been fully developed and is intended to be added at an appropriate time. The preparation of this Standards Publication was done by the Lighting Fixture Section, in close cooperation with the Lamp and Ballast Sections of the NEMA Lighting Systems Division. Input of users and other intereste
13、d parties has been sought and evaluated. Inquiries, comments, and proposed or recommended revisions should be submitted to the Indoor Lighting Section of NEMA by contacting: Vice President, Engineering National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, Virginia
14、 22209 This standard was developed by the Lighting Fixtures Section. Section approval of the standard does not necessarily imply that all section members voted for its approval or partiCipated in its development. At the time it was approved, the Lighting Fixtures Section was composed of the followin
15、g members: American Electric Lighting-Memphis, TN Cooper Lighting Group-Elk Grove Village, IL Durolite-Fairfield, NJ GE Lighting Systems-Hendersonville, NC Holophane Corporation-Newark, OH Hubbell Lighting Inc.-Christiansburg, VA Indy Lighting, Inc.-Fishers, IN Juno Lighting, Inc.-Des Plaines, IL Li
16、ghting Corporation of America-San Leandro, CA Lithonia Lighting-Conyers, GA O-Z Gedney-Tulsa, OK Paramount Industries, I nc.-Croswell , MI Red Dot Division, L.E. Mason Co.-Boston, MA Simkar Lighting Fixture Co.-Philadelphia, PA SPI Lighting, Inc.-Mequon, WI The Genlyte Group-Union, NJ The Jones Meta
17、l Products Company-West Lafayette, OH Thomas Lighting, Inc.-Tupelo, MS I I I I I STD.NEMA LE 5A-ENGL 1999 II 6470247 0516239 TT9 II LE 5A-1999 Pageiv The purpose of this standards publication is to: PURPOSE a. Provide governmental agencies with a practical and uniform method for calculating a metric
18、 for evaluating and comparing the “energy efficiency“ of downlight luminaires. b. Create a workable and realistic number of downlight luminaire types, which can be used to evaluate energy usage. c. Organize the types of luminaires into categories which will reasonably represent the design function,
19、physical and dimensional attributes, and the photometric characteristics of the various types of high volume luminaires. d. Preserve for the luminaire manufacturers and the lighting industry the flexibility to use laboratory facilities, testing methods, and completed test data that currently exist a
20、nd are in accordance with approved industry standards. e. Establish a luminaire efficacy rating (LER) based on rated lumens per watt, in place of a standard based solely on either coefficients of utilization or luminaire efficiency. The word “rated“ is used so as not to require the use of absolute p
21、hotometry and to be able to use published rated lumen values. LER is calculated using both ballast factor, when applicable, and total input watts to establish the rated efficacy of the luminaire. (LER is given in rated lumens per watt.) NOTE-Photometric tests of luminaires that were completed prior
22、to issue date of this document may be used for calculation of LER values by substituting appropriate ballast fadors and input power values as necessary from component manufadurers reference data or from Tables A-2 and A-3. STD.NEMA LE 5A-ENGL 1999 II 6470247 0516240 710 II 1.1 SCOPE Section 1 GENERA
23、L LE 5A-1999 Page 1 This Standards Publication provides a procedure for the determination of the luminaire efficacy rating of down light luminaires under laboratory test conditions. It includes general lighting down lights for space illumination only and does not apply to specialized usage fixtures,
24、 such as accent luminaires, track luminaires, wallwashers, color filtered luminaires, aesthetically customized trims, low voltage luminaires, etc. These exceptions have intended uses that are complex and are critical to the applications that require their usage. Their effect on energy consumption ca
25、n best be handled by power budgeting similar to the approaches taken in ASHRAElIES 90.1-1989. Factors affecting comfort are not addressed at this time, but will be evolved into a future “quality metric. Highlighting luminaires, with beam spreads less than 30 degrees, as well as luminaires with measu
26、red aperture diameters less than four (4) inches are not covered by this standard. Reflector type lamps are excluded from this downlight standard due to their extremely superior lumen utilization over and above bare general service incandescent sources within luminaires. Since luminaire output gener
27、ally approximates reflector lamp output, energy and performance regulation for reflector type lamps is best addressed by lamp standards. Self-ballasted high intensity discharge or integrally ballasted compact fluorescent lamps are not considered in the scope of this standard. Lamps that require ball
28、asts that do not have ANSI standard specifications and an ANSI standard for reference ballast are excluded from this down light standard. 1.2 REFERENCED DOCUMENTS The latest editions and revisions of the following publications are adopted as indicated by reference in this Standards Publication. ANSI
29、 C78.375-1997 ANSI C78.386-1994 ANSI C78.387-1995 ANSI C78.388-1994 ANSI C78.4-1995 ANSI C82.2-1995 ANSI C82.3-1995 ANSI C82.5-1995 American National Standards Institute (ANSI) 11 West 42nd Street, 13th Floor New York, NY 10036 Fluorescent Lamps-Guide for Electrical Measurement Mercury Lamps-Measure
30、ment Characteristics Metal-halide Lamps-Measurement Characteristics High Pressure Sodium Lamps-Measurement Characteristics Fluorescent Lamps-Self Supporting, Single Based Compact Typeg.; Dimensional and Electrical Characteristics Fluorescent Lamp Ballasts-Methods of Measurement Reference Ballasts fo
31、r Fluorescent Lamps High Intensity Discharge Lamp Reference Ballasts, Specifications FOB I I I I STD.NEMA LE 5A-ENGL 1999 6470247 0516241 657 LE 5A-1999 Page 2 ANSI C82.6-1996 ANSI/IEEE 100-1988 Ballasts for HID Lamps, Method of Measurement IEEE Standard Dictionary of Electrical and Electronics Term
32、s Illuminating Engineering Society of North America (IESNA) 120 Wall Street FL 17 New York, NY 10005-4001 IESNA lighting Handbook, Eighth Edition, 1993. LM 66-1991 LM 45-1991 LM 51-1993 LM 46-1998 LM 41-1998 1.3 DEFINITIONS Single-ended Compact Fluorescent Lamps-Electrical and Photometric Measuremen
33、ts Incandescent Lamps-Electrical Measurements High IntenSity Discharge (HID) Lamps-Electrical Measurements Photometric Testing of Indoor Luminaires using HID or Incandescent Filament Lamps Approved Method for Photometric Testing of Indoor Fluorescent Luminaires baffle: A light-absorbing element with
34、in the luminaire aperture having a stepped surface or a reflectance factor of 25 percent. ballast: An auxiliary device used with an electrical discharge lamp(s) to obtain the necessary circuit conditions (voltage, current, and wave form) for the proper starting and operation of a particular fluoresc
35、ent or high intenSity discharge (HID) lamp(s) from a particular line voltage and frequency. ballast factor: A term used to describe the percentage of light output, produced when a fluorescent or HID lamp(s) is energized from a commercially available ballasts, as compared to the light output produced
36、 when energized from a reference ballast. Ballast factor tests are run in accordance with ANSI C82.2 and ANSI C82.6. compact fluorescent lamp: A compact shape fluorescent lamp with a single base that performs the entire mechanical support function. downlight: A small, direct lighting unit which dire
37、cts the light downward and can be recessed, surface mounted, or suspended. fixture: The structural parts of a luminaire, including parts designed to distribute the light, to position and/or protect the lamp(s), to mount and support the ballast(s), when applicable, and to provide a wireway or means o
38、f connecting the lamp(s) and ballast(s), when applicable, to the power supply. A fixture includes the ballast(s), when applicable, but does not include lamp(s). fluorescent lamp: A low pressure mercury electric-clischarge lamp in which a fluorescing coating (phosphor) transforms a portion of the ult
39、raviolet energy generated by the arc discharge into visible light. high intenSity discharge (HID) lamp: An electric discharge lamp in which the light producing arc is stabilized by wall temperature, and the arc tube has a bulb wall loading in excess of three watts per square centimeter. HID lamps in
40、clude groups of lamps known as mercury vapor, metal halide, and high pressure sodium. STD.NEMA LE 5A-ENGL 1999 b470247 051b242 593 LE SA-1999 Page 3 incandescent lamp: A lamp in which light is produced by a filament heated to incandescence by an electric current. lens: A glass or plastic element use
41、d in luminaires to change the direction and control the distribution of light rays. louver: An element used in luminaires to divide the aperture into multiple light directing cells. luminaire: A complete lighting unit consisting of a lamp or lamps and ballast(s, when applicable, together with parts
42、designed to distribute the light, to position and protect the lamps, and to connect the lamps through the ballast(s), when applicable, to the power supply. luminaire efficacy rating (LER): A term used to describe a mathematical method of determining the rated efficacy of a luminaire. optical enclosu
43、re: That part of a luminaire which encloses the light-emitting opening and interacts with a light source to control the luminaire light distribution. reference ballast: A ballast especially constructed to have certain prescribed electrical characteristics for use in testing electrical discharge lamp
44、s and other ballasts in accordance with ANSI C82.3 or ANSI C82.S. shielding angle (of a luminaire): The angle between a horizontal line through the light center and the line of sight at which the bare source first becomes visible, as viewed from all lateral angles. For the purpose of this standard,
45、a shielding angle of 40 shall be considered as “less shielded (L),“ and an angle of 40 shall be considered to be “highly shielded (H).“ For the purpose of this standard, the lens of a lensed system shall be considered the “bare source.“ I I STD.NEMA LE 5A-ENGL 1999 6470247 0516243 42T Section 2 SELE
46、CTION OF COMPONENTS 2.1 TEST SPECIMEN-LUMINAIRE LE 5A-1999 PageS The luminaire selected for test shall be clean and representative of the manufacturers current and regular production. 2.2 TEST SPECIMEN(S)-COMPACT FLUORESCENT AND HID BALLAST(S) Ballast(s) chosen for the test shall be typical of curre
47、nt production. Ballasts shall be tested and certified as having ballast factors that are within +/- 0.025 of established average ballast factors or the manufacturers published ballast factor, for the particular ballast when tested in accordance with ANSI C82.2 or ANSI C82.6. 2.3 TEST SPECIMEN(S) -CO
48、MPACT FLUORESCENT LAMPS, INCANDESCENT LAMPS, HID LAMPS (REFERENCES: IESNA LM 41 AND LM 46) Lamps of stable output should be used. They should be constant in light output for constant line voltage and repeated operation. Lamps selected for tests should be typical of current production and should be s
49、elected for uniform luminance, consistent with their geometry. Lamp Type Incandescent Compact Fluorescent HID Bulb Type A,PS Quad Tube Twin Tube Multi-tube E,B,BT,ED,T Wattage Limitations 100-300W 13-32 W 150W This standard covers highest usage sources for the categories of downlights. Most HID industrial luminaires with tamp wattages greater than 150w are covered in NEMA Standards Publication LESS. Previous page is blank I I STD.NEMA LE 5A-ENGL 1999 6470247 0516244 366 Section 3 TESTING FACILITIES AND EQUIPMENT 3.1 FACILITIES LE 5A-1999 Page 7 Because of the importance of
