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APPENDIX 3A. LIGHTING DEFINITIONS IN THE UNITED STATES CODE AND 

CODE OF FEDERAL REGULATIONS 

TABLE OF CONTENTS 

3A.1 INTRODUCTION ........................................................................................................ 3A-1

3A.2 GENERAL SERVICE FLUORESCENT LAMPS....................................................... 3A-1

3A.2.1 United States Code Definitions......................................................................... 3A-1

3A.2.2 Code of Federal Regulations Definitions in 10 CFR 430.2 .............................. 3A-2

3A.3 INCANDESCENT REFLECTOR LAMPS.................................................................. 3A-4

3A.3.1 United States Code Definitions......................................................................... 3A-4

3A.3.2 Code of Federal Regulations Definitions in 10 CFR 430.2 .............................. 3A-5

3A.4 ALL COVERED LAMPS ............................................................................................ 3A-7
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APPENDIX 3A. LIGHTING DEFINITIONS IN THE UNITED STATES CODE AND 

CODE OF FEDERAL REGULATIONS 

3A.1 INTRODUCTION 

Appendix 3A provides definitions from the United States Code (U.S.C.) and Code of 

Federal Regulations (CFR) for the lamp products covered under this rulemaking. (42 U.S.C. 

6291(30); 10 CFR section 430.2) These definitions do not include fluorescent lamp definitions 

associated with fluorescent ballast standards. 

3A.2 GENERAL SERVICE FLUORESCENT LAMPS 

3A.2.1 United States Code Definitions 

42 U.S.C. 6291(30)(A) 

Except as provided in subparagraph (E), the term “fluorescent lamp” means a low 

pressure mercury electric-discharge source in which a fluorescing coating transforms 

some of the ultraviolet energy generated by the mercury discharge into light, including 

only the following: 

(i) Any straight-shaped lamp (commonly referred to as 4-foot medium bi-pin lamps) 

with medium bi-pin bases of nominal overall length of 48 inches and rated 

wattage of 28 or more. 

(ii) Any U-shaped lamp (commonly referred to as 2-foot U-shaped lamps) with medium 

bi-pin bases of nominal overall length between 22 and 25 inches and rated 

wattage of 28 or more. 

(iii) Any rapid start lamp (commonly referred to as 8-foot high output lamps) with 

recessed double contact bases of nominal overall length of 96 inches and 0.800 

nominal amperes, as defined in ANSI C78.1–1978 and related supplements. 

(iv) Any instant start lamp (commonly referred to as 8-foot slimline lamps) with single 

pin bases of nominal overall length of 96 inches and rated wattage of 52 or more, 

as defined in ANSI C78.3–1978 (R1984) and related supplement ANSI C78.3a–

1985

42 U.S.C. 6291(30)(E) 

The terms “fluorescent lamp” and “incandescent lamp” do not include any lamp 

excluded by the Secretary, by rule, as a result of a determination that standards for such 

lamp would not result in significant energy savings because such lamp is designed for 

special applications or has special characteristics not available in reasonably 

substitutable lamp types. 

42 U.S.C. 6291(30)(B) 

The term “general service fluorescent lamp” means fluorescent lamps which can be used 

to satisfy the majority of fluorescent applications, but does not include any lamp designed 

and marketed for the following nongeneral lighting applications: 
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(i) Fluorescent lamps designed to promote plant growth. 

(ii) Fluorescent lamps specifically designed for cold temperature installations. 

(iii) Colored fluorescent lamps. 

(iv) Impact-resistant fluorescent lamps. 

(v) Reflectorized or aperture lamps. 

(vi) Fluorescent lamps designed for use in reprographic equipment. 

(vii) Lamps primarily designed to produce radiation in the ultra-violet region of the 

spectrum. 

(viii) Lamps with a color rendering index of 87 or greater.

3A.2.2 Code of Federal Regulations Definitions in 10 CFR 430.2 

 Basic model means all units of a given type of covered product (or class thereof) 

manufactured by one manufacturer, having the same primary energy source, and which 

have essentially identical electrical, physical, and functional (or hydraulic) 

characteristics that affect energy consumption, energy efficiency, water consumption, or 

water efficiency; and 

(1) With respect to general service fluorescent lamps, general service incandescent 

lamps, and incandescent reflector lamps: Lamps that have essentially identical 

light output and electrical characteristics—including lumens per watt (lm/W) and 

color rendering index (CRI). 

* * * * *

Cold temperature fluorescent lamp means a fluorescent lamp specifically designed to 

start at −20 °F when used with a ballast conforming to the requirements of ANSI C78.81 

(incorporated by reference; see § 430.3) and ANSI C78.901 (incorporated by reference; 

see § 430.3), and is expressly designated as a cold temperature lamp both in markings on 

the lamp and in marketing materials, including catalogs, sales literature, and 

promotional material. 

 Colored fluorescent lamp means a fluorescent lamp designated and marketed as a 

colored lamp and not designed or marketed for general illumination applications with 

either of the following characteristics: 

(1) A CRI less than 40, as determined according to the method set forth in CIE 

Publication 13.3 (incorporated by reference; see § 430.3); or 

(2) A correlated color temperature less than 2,500K or greater than 7,000K as 

determined according to the method set forth in IES LM-9 (incorporated by 

reference; see § 430.3). 

Fluorescent lamp means a low pressure mercury electric-discharge source in which a 

fluorescing coating transforms some of the ultraviolet energy generated by the mercury 

discharge into light, including only the following: 

(1) Any straight-shaped lamp (commonly referred to as 4-foot medium bipin lamps) 

with medium bipin bases of nominal overall length of 48 inches and rated wattage 

of 25 or more; 
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(2) Any U-shaped lamp (commonly referred to as 2-foot U-shaped lamps) with medium 

bipin bases of nominal overall length between 22 and 25 inches and rated 

wattage of 25 or more; 

(3) Any rapid start lamp (commonly referred to as 8-foot high output lamps) with 

recessed double contact bases of nominal overall length of 96 inches; 

(4) Any instant start lamp (commonly referred to as 8-foot slimline lamps) with single 

pin bases of nominal overall length of 96 inches and rated wattage of 52 or more; 

(5) Any straight-shaped lamp (commonly referred to as 4-foot miniature bipin standard 

output lamps) with miniature bipin bases of nominal overall length between 45 

and 48 inches and rated wattage of 26 or more; and 

(6) Any straight-shaped lamp (commonly referred to 4-foot miniature bipin high output 

lamps) with miniature bipin bases of nominal overall length between 45 and 48 

inches and rated wattage of 49 or more. 

Rated wattage means: 

(1) With respect to fluorescent lamps and general service fluorescent lamps: 

(i) If the lamp is listed in ANSI C78.81 (incorporated by reference; see § 430.3) 

or ANSI C78.901 (incorporated by reference; see § 430.3), the rated 

wattage of a lamp determined by the lamp designation of Clause 11.1 of 

ANSI C78.81 or ANSI C78.901; 

(ii) If the lamp is a residential straight-shaped lamp, and not listed in ANSI 

C78.81 (incorporated by reference; see § 430.3), the wattage of a lamp 

when operated on a reference ballast for which the lamp is designed; or 

(iii) If the lamp is neither listed in one of the ANSI standards referenced in (1)(i) 

of this definition, nor a residential straight-shaped lamp, the electrical 

power of a lamp when measured according to the test procedures outlined 

in appendix R to subpart B of this part. 

* * * * *

 Residential straight-shaped lamp means a low pressure mercury electric-discharge 

source in which a fluorescing coating transforms some of the ultraviolet energy 

generated by the mercury discharge into light, including a straight-shaped fluorescent 

lamp with medium bi-pin bases of nominal overall length of 48 inches and is either 

designed exclusively for residential applications; or designed primarily and marketed 

exclusively for residential applications. 

(1) A lamp is designed exclusively for residential applications if it will not function for 

more than 100 hours with a commercial high-power-factor ballast. 

(2) A lamp is designed primarily and marketed exclusively for residential applications 

if it: 

(i) Is permanently and clearly marked as being for residential use only; 

(ii) Has a life of 6,000 hours or less when used with a commercial high-powerfactor ballast; 

(iii) Is not labeled or represented as a replacement for a fluorescent lamp that is 

a covered product; and 
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(iv) Is marketed and distributed in a manner designed to minimize use of the 

lamp with commercial high-power-factor ballasts. 

(3) A manufacturer may market and distribute a lamp in a manner designed to 

minimize use of the lamp with commercial high-power-factor ballasts by: 

(i) Packaging and labeling the lamp in a manner that clearly indicates the lamp 

is for residential use only and includes appropriate instructions 

concerning proper and improper use; if the lamp is included in a catalog 

or price list that also includes commercial/industrial lamps, listing the 

lamp in a separate residential section accompanied by notes about proper 

use on the same page; and providing as part of any express warranty 

accompanying the lamp that improper use voids such warranty; or 

(ii) Using other comparably effective measures to minimize use with 

commercial high-power-factor ballasts. 

3A.3 INCANDESCENT REFLECTOR LAMPS

3A.3.1 United States Code Definitions 

42 U.S.C. 6291(30)(C) 

Except as provided in subparagraph (E), the term “incandescent lamp” means a lamp in 

which light is produced by a filament heated to incandescence by an electric current, 

including only the following: 

(i) Any lamp (commonly referred to as lower wattage nonreflector general service 

lamps, including any tungsten-halogen lamp) that has a rated wattage between 30 

and 199 watts, has an E26 medium screw base, has a rated voltage or voltage 

range that lies at least partially within 115 and 130 volts, and is not a reflector 

lamp.

(ii) Any lamp (commonly referred to as a reflector lamp) which is not colored or 

designed for rough or vibration service applications, that contains an inner 

reflective coating on the outer bulb to direct the light, an R, PAR, ER, BR, BPAR, 

or similar bulb shapes with E26 medium screw bases, a rated voltage or voltage 

range that lies at least partially within 115 and 130 volts, a diameter which 

exceeds 2.25 inches, and has a rated wattage that is 40 watts or higher 

(iii) Any general service incandescent lamp (commonly referred to as a high- or higherwattage lamp) that has a rated wattage above 199 watts (above 205 watts for a 

high wattage reflector lamp). 

42 U.S.C. 6291(30)(E) 

The terms “fluorescent lamp” and “incandescent lamp” do not include any lamp 

excluded by the Secretary, by rule, as a result of a determination that standards for such 

lamp would not result in significant energy savings because such lamp is designed for 

special applications or has special characteristics not available in reasonably 

substitutable lamp types. 
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42 U.S.C. 6291(30)(F) 

The term “incandescent reflector lamp” means a lamp described in subparagraph 

(C)(ii). 

42 U.S.C. 6291(30)(I) 

The term “bulb shape” means the shape of lamp, especially the glass bulb with 

designations for bulb shapes found in ANSI C79.1–1980 (R1984). 

42 U.S.C. 6291(51) 

 The term “medium screw base” means an Edison screw base identified with the prefix E–

26 in the “American National Standard for Electric Lamp Bases”, ANSI/IEC C81.61–

2003, published by the American National Standards Institute. 

42 U.S.C. 6291(54) 

 BPAR incandescent reflector lamp.—The term “BPAR incandescent reflector lamp” 

means a reflector lamp as shown in figure C78.21–278 on page 32 of ANSI C78.21–

2003.

3A.3.2 Code of Federal Regulations Definitions in 10 CFR 430.2 

Basic model means all units of a given type of covered product (or class thereof) 

manufactured by one manufacturer, having the same primary energy source, and which 

have essentially identical electrical, physical, and functional (or hydraulic) 

characteristics that affect energy consumption, energy efficiency, water consumption, or 

water efficiency; and 

(1) With respect to general service fluorescent lamps, general service incandescent 

lamps, and incandescent reflector lamps: Lamps that have essentially identical 

light output and electrical characteristics—including lumens per watt (lm/W) and 

color rendering index (CRI). 

 * * * * * 

Colored incandescent lamp means an incandescent lamp designated and marketed as a 

colored lamp that has— 

(1) A color rendering index of less than 50, as determined according to the test method 

given in CIE 13.3 (incorporated by reference; see § 430.3); or 

(2) A correlated color temperature of less than 2,500K, or greater than 4,600K, where 

correlated temperature is computed according to the “Computation of Correlated 

Color Temperature and Distribution Temperature,” Journal of the Optical 

Society of America, (incorporated by reference; see § 430.3). 

 Design voltage with respect to an incandescent lamp means: 

(1) The voltage marked as the intended operating voltage; 

(2) The mid-point of the voltage range if the lamp is marked with a voltage range; or 

(3) 120 V if the lamp is not marked with a voltage or voltage range. 
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 Incandescent lamp means a lamp in which light is produced by a filament heated to 

incandescence by an electric current, including only the following: 

(1) Any lamp (commonly referred to as lower wattage non-reflector general service 

lamps, including any tungsten halogen lamp) that has a rated wattage between 30 

and 199, has an E26 medium screw base, has a rated voltage or voltage range 

that lies at least partially in the range of 115 and 130 volts, and is not a reflector 

lamp.

(2) Any incandescent reflector lamp. 

(3) Any general service incandescent lamp (commonly referred to as a high-or higherwattage lamp) that has a rated wattage above 199 (above 205 for a high wattage 

reflector lamp). 

 Incandescent reflector lamp (commonly referred to as a reflector lamp) means any lamp 

in which light is produced by a filament heated to incandescence by an electric current, 

which: is not colored or designed for rough or vibration service applications that 

contains an inner reflective coating on the outer bulb to direct the light; has an R, PAR, 

ER, BR, BPAR, or similar bulb shapes with an E26 medium screw base; has a rated 

voltage or voltage range that lies at least partially in the range of 115 and 130 volts; has 

a diameter that exceeds 2.25 inches; and has a rated wattage that is 40 watts or higher. 

Modified spectrum means, with respect to an incandescent lamp, an incandescent lamp 

that— 

(1) Is not a colored incandescent lamp; and 

(2) When operated at the rated voltage and wattage of the incandescent lamp— 

(A) Has a color point with (x,y) chromaticity coordinates on the C.I.E. 1931 

chromaticity diagram, figure 2, page 3 of IESNA LM-16 (incorporated by 

reference; see § 430.3) that lies below the black-body locus; and 

(B) Has a color point with (x,y) chromaticity coordinates on the C.I.E. 1931 

chromaticity diagram, figure 2, page 3 of IESNA LM-16 (incorporated by 

reference; see § 430.3) that lies at least 4 MacAdam steps, as referenced in 

IESNA LM-16, distant from the color point of a clear lamp with the same filament 

and bulb shape, operated at the same rated voltage and wattage. 

 Rated voltage with respect to incandescent lamps means: 

(1) The design voltage if the design voltage is 115 V, 130 V or between 115V and 130 

V;

(2) 115 V if the design voltage is less than 115 V and greater than or equal to 100 V 

and the lamp can operate at 115 V; and 

(3) 130 V if the design voltage is greater than 130 V and less than or equal to 150 V 

and the lamp can operate at 130 V. 
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Rated wattage means: 

* * *

(2) With respect to general service incandescent lamps and incandescent reflector 

lamps, the electrical power measured according to the test procedures outlined in 

appendix R to subpart B of this part. 

Rough or vibration service incandescent reflector lamp means a reflector lamp: in which 

a C-11 (5 support), C-17 (8 support), or C-22 (16 support) filament is mounted (the 

number of support excludes lead wires); in which the filament configuration is as shown 

in Chapter 6 of the 1993 Illuminating Engineering Society of North America Lighting 

Handbook, 8th Edition (see 10 CFR 430.22); and that is designated and marketed 

specifically for rough or vibration service applications. 

 Voltage range means a band of operating voltages as marked on an incandescent lamp, 

indicating that the lamp is designed to operate at any voltage within the band. 

3A.4 ALL COVERED LAMPS

42 U.S.C. 6291(30)(G) 

The term “average lamp efficacy” means the lamp efficacy readings taken over a 

statistically significant period of manufacture with the readings averaged over that 

period. 

42 U.S.C. 6291(30)(H) 

The term “base” means the portion of the lamp which connects with the socket as 

described in ANSI C81.61–1990.

42 U.S.C. 6291(30)(J) 

The term “color rendering index” or “CRI” means the measure of the degree of color 

shift objects undergo when illuminated by a light source as compared with the color of 

those same objects when illuminated by a reference source of comparable color 

temperature. 

42 U.S.C. 6291(30)(K) 

The term “correlated color temperature” means the absolute temperature of a blackbody 

whose chromaticity most nearly resembles that of the light source. 

10 CFR 430.2

 Lamp Efficacy (LE) means the measured lumen output of a lamp in lumens divided by the 

measured lamp electrical power input in watts expressed in units of lumens per watt 

(LPW). 

42 U.S.C. 6291(30)(N) 

The term “lamp type” means all lamps designated as having the same electrical and 

lighting characteristics and made by one manufacturer. 
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42 U.S.C. 6291(30)(O) 

The term “lamp wattage” means the total electrical power consumed by a lamp in watts, 

after the initial seasoning period referenced in the appropriate IES standard test 

procedure and including, for fluorescent, arc watts plus cathode watts. 

42 U.S.C. 6291(30)(P) 

The terms “life” and “lifetime” mean length of operating time of a statistically large 

group of lamps between first use and failure of 50 percent of the group in accordance 

with test procedures described in the IES Lighting Handbook-Reference Volume. 

42 U.S.C. 6291(30)(Q) 

The term “lumen output” means total luminous flux (power) of a lamp in lumens, as 

measured in accordance with applicable IES standards as determined by the Secretary.