Lamp base styles

Some of the above base styles are now obsolete. The trend in recent years has been to design newer bases to reduce waste of raw materials and simplify the replacement process.

Standards

International Electrotechnical Commission (IEC)
* IEC 60061-1, Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps
* IEC 60061-2, Lamp caps and holders together with gauges for the

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