This standard sets forth the physical and electrical characteristics of the group of incandescent lamps that have A@ G@ PS@ and similar bulb shapes with E39 mogul screw (single- or double-wntact) bases. Only clear@ inside frost@ and white bulb finishes are acknowledged. Excluded from coverage are tungstenhalogen lamps and projection lamps. In addition to common-line voitage lamps@ listed in Table 1 @ a group of series burning lamps rated at constant current are covered in Table 2. Other groups of incandescent lamps are covered in the following related standards: ANSI C78.20-1995@ American National Standard for Electric Lamps - Incandescent Lamps - A@ G@ PS@ and Similar Shapes with E26 Medium Screw Bases ANSI C78.21-1995@ American National Standard for Electric Lamps - Incandescent Lamps - PAR and R Shapes ANSI C78.23-1995@ American National Standard for Electric Lamps - Incandescent Lamps - Miscellaneous Types At the time of issuance of this standard@ there was no comparable standard published by the International Electrotechnical Commission (IEC).