|  |  | ES (Edison Screw) - also referred to as E27. 27mm diameter |
 | SES (Small Edison Screw) - also referred to as E14. 14mm diameter |
 | BC (Bayonet Cap) - also referred to as B22. 22mm diameter |
 | SBC (Small Bayonet Cap) - also referred to as B15. 15mm diameter |
 | G9 mains voltage - these sometimes have flat tags instead of loops |
 | G4 - low voltage use - 4mm between the pins |
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