I know that standard incandescent bulbs in the US use Edison screw bases, but I'm not sure which designation / number is the one which is used for prolific non-candelabra 120 volt fixtures.
For those who like to do things the hard way, it is also 7004-21A-2 (From IEC Standard sheet 60061-1 (of course)
The E26 is the 'standard' for 110 Volt systems and the E27 is the standard for 220 Volt systems. (The E27 being IEC 7004-21)
protected by Community♦ Mar 18 '15 at 3:42
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