American National Standard Electric Lamps: PAR and R Shapes
ANSI_ANSLG C78.21-2011 [BUY]
Covers lamps with clear, frosted and lens end bulbs, clear and prescription lenses, and with various reflector coatings. Lamps described in this standard may contain incandescent filament or a tungsten halogen inner bulb. .
Published Date: Oct.24.2011