Changing a lightbulb

How many people does it take to change a lightbulb?

1.But it can take many more to work out exactly which type of lightbulb it is.

Well it's a screw-type an Edison, but not an Edison exactly the fitting's too small. A Small Edison Screw (SES) still too small a fitting. Must be a Miniature Edison Screw (MES) then.

What's the voltage? Um. What's the amperage? Um. So we order a few MES bulbs of various voltages. They're too small. So something between a SES and an MES; oh must be a CES - Candelabra Edison Screw

The differences in the ES diameter: MES - 10mm; CES - 12mm; SES - 14mm. Oh yes I can see exactly why three different types are required here... sigh.