General Service Incandescent Lamps Regulations - Acuity Brands
For the purposes of this regulation a general service incandescent lamp is a standard incandescent or halogen incandescent lamp that is intended for general service applications; has a medium screw base; has a lumen range of 310 to 2,600 lumens; and is capable of being operated at a voltage range within 110 and 130 volts.  However, however this definition does not apply to the following incandescent lamps—

1. An appliance lamp;
2.  A black light lamp;
3.  A bug lamp;
4.  A colored lamp;
5.  An infrared lamp;
6.  A left-hand thread lamp;
7.  A marine lamp;
8.  A marine signal service lamp;
9.  A mine service lamp;
10.  A plant light lamp;
11. A reflector lamp;
12. A rough service lamp;
13. A shatter-resistant lamp (including a shatter-proof lamp and a shatter protected lamp);
14. A sign service lamp;
15. A silver bowl lamp;
16. A showcase lamp;
17. A 3-way incandescent lamp;
18. A traffic signal lamp;
19. A vibration service lamp;
20. A G shape lamp (as defined in ANSI C78.20) (incorporated by reference; see § 430.3) and ANSI C79.1–2002 (incorporated by reference; see § 430.3) with a diameter of 5 inches or more;
21. A T shape lamp (as defined in ANSI C78.20) (incorporated by reference; see § 430.3) and ANSI C79.1–2002 (incorporated by reference; see § 430.3) and that uses not more than 40 watts or has a length of more than 10 inches; and
22. A B, BA, CA, F, G16–1/2, G–25, G30, S, or M–14 lamp (as defined in ANSI C79.1–2002) (incorporated by reference; see § 430.3) and ANSI C78.20 (incorporated by reference; see § 430.3) of 40 watts or less.

(1) Standard-spectrum general service incandescent lamps manufactured and distributed in commerce, shall have a color rendering index (CRI) greater than or equal to 80 and shall have rated maximum wattage, minimum lifetime, and compliance date as shown in the table below:
Modified-spectrum general service incandescent lamps manufactured and distributed in commerce, shall have a color rendering index (CRI) greater than or equal to 75 and shall have rated maximum wattage, minimum lifetime, and compliance date as shown in the table below.
(2) Each candelabra base incandescent lamp shall not exceed 60 rated watts.
(3) Each intermediate base incandescent lamp shall not exceed 40 rated watts.

Useful Links

DOE Home Page on GS Incandescents
Certain Lamps Exempted from GSIL Standards
Test Procedures