The newest amendments about lamp cap gages about IEC 60061 standard.

 Amendment 48: just amend IEC 60061-1. not only including concerns five types caps , lamp caps and draw, but also including the details about those lamp caps.

Amendment 45: just amend IEC 60061-2, Lampholders, covering three types of lampholders whose characteristics match those about three of the caps listed in Amendment 48 for IEC 60061-1.

Amendment 46: just amend IEC 60061-3,gages,grants details about gages which used to measuring max insertion or withdrawal torques in lampholders and for go and nogo gages are basis of checking pin diameters about caps.