I built myself a little box that uses a center-off
DPDT switch to
select whether that light bulb is inline with the outlet in the box
or not.
My father built himself a board which was similar but more elaborate:
he could select among (1) a small (7.5W?) light bulb, (2) a large
(100W?) light bulb, (3) a high-wattage heating element that was still
under the breaker trip current for that mains circuit (an iron, I
think), or (4) no limiter at all.
If I did much work where such a thing were useful, I probably would
have put together something similar myself. :-)
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