ANSI C78.1431-1997
ANSI C78.1431-1997
Consolidation/Revision of C78.1405-1991, C78.1422-1991 and C78.1423-1991 - Slide Projector Lamps - Condensing, Dichroic, 2 in. (51 mm), Integral Reflector, Rim Reference Tungsten Halogen Lamps with GY5.3
standard published 06/01/1997 by American National Standards Institute