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About This Item

 

Full Description

Provides physical and electrical characteristics of the group of incandescent lamps that have PAR and R bulb shapes. Covers lamps with clear, frosted and lens end bulbs, clear and prescription lenses, and with various reflector coatings are covered.
 

Document History

  1. ANSI C78.21-2022


    American National Standard for Incandescent Lamps— PAR and R Shapes

    • Most Recent
  2. ANSI C78.21-2011 (R2016)


    American National Standard for Electric Lamps - PAR and R Shapes

    • Historical Version
  3. ANSI/ANSLG C78.21-2003

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    viewing


    American National Standard for Electric Lamps - PAR and R Shapes

    • Historical Version
  4. ANSI C78.21-1995


    American National Standard for Incandescent Lamps - PAR and R Shapes

    • Historical Version