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ANSI C78.21 : 2011(R2016)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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American National Standard for Electric Lamps—PAR and R Shapes
Hardcopy , PDF
03-01-2023
English
22-12-2022
Foreword
Part I - General Information
1 Scope
2 Normative References
3 Definitions and abbreviations
4 Lamp designations
5 Bulb designations
6 Bulb finish
7 Beam photometry and classification
8 Lamp drawings
9 Electrical characteristics
10 Requirements
11 Information on luminaire design
Part II - Lamp Classes
Part III - Lamp Space Drawings
Part IV - Product Drawings
Annexes
Annex A - Informative References
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