scope:

This standard sets forth the physical and electrical characteristics of the group of incandescent lamps that have C, S, T, or similar bulb shapes which are not covered in American National Standards ANSI C78.20-1989 and ANSI C78.22-1989. Only clear and inside frost bulb finishes are acknowledged. Excluded from coverage are tungsten-halogen lamps and projection lamps. Other groups of incandescent lamps are covered in the following associated standards:

American National Standard for Electric Lamps - Incandescent Lamps - A, G, PS and Similar Shapes with E26 Medium Screw Bases, ANSI C78.20-1995

American National Standard for Electric Lamps - Incandescent Lamps - PAR and R Shapes, ANSI C78.21-1995

American National Standard for Electric Lamps - Incandescent Lamps - A, G, PS and Similar Shapes with E39 Medium Screw Bases, ANSI C78.22-1995

The lamps specified in this standard do not relate closely to those internationally standardized lamps specified in International Electrotechnical Commission (IEC) Publication 64, Tungsten Filament Lamp for Domestic and Similar General Lighting Purposes.¹

¹ Available from the American National Standards Institute, 11 West 42nd St., New York, NY 10036.