ANSI C78.379-2006 pdf download American National Standard for electric lamps— Classification of the Beam Patterns of Reflector Lamps
1 Scope, purpose, and application
1.1 Scope This standard describes a system for classification of beam patterns and beam angles of reflector lamps. Also a method of describing light output is defined. Reflector lamps are considered to be those lamps having a reflective coating applied to the reflector part of the bulb or a reflector permanently attached to the bulb with the reflector at least partially controlling the light flux distribution. Partial reflector lamps are also covered. Both symmetrical and asymmetrical beams can be classified. Lamps with various kinds of light sources are covered.
1.2 Purpose The purpose of this standard is to provide a means to designate nominal beam angles and define expected tolerances about the nominal. This classification applies only to bare lamps and excludes luminaires or other systems.
1.3 Application The definitions and classification included in this standard apply only to lamps for general lighting applications.
2 Normative References The following publications contain provisions which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the publications indicated below.
ANSI C78.21-2003, Incandescent PAR and R shapes
ANSI C78.40-1992, Specifications for Mercury lamps
ANSI C78.42-2004, High pressure Sodium lamps
ANSI C78.43-2005, Single-end Metal Halide lamps
ANSI C78.380-2005, Method of designation of HID lamps
ANSI C78.1340 – 1990, 450-Watt, 230-volt self-ballasted Mercury lamps
ANSI C78.1341 – 1990, 750-Watt, 120-volt self-ballasted Mercury lamps
ANSI C78.1342 – 1990, 160-Watt, 120-volt self-ballasted Mercury lamps
ANSI C78.1380 – 1988, 250-Watt, 120-volt self-ballasted Mercury lamps
ANSI/IES RP-16-1996, Nomenclature and definitions for illuminating engineering IES LM20-1994, Approved method for photometric testing of reflector type lamps