Usually just one, because women are capable of doing many of the same things men are capable of.
However, if it is a lightbulb that is very high up and requires a ladder, it might require two feminists, one to change the lightbulb, and one to hold the ladder.
Of course, it is possible for the feminist to change the lightbulb with someone who is not or does not believe themselves to be a feminist. So then it would one feminist changing the light bulb with the assistance of someone who is not a feminist.
Although if that second person who believes themselves not to be a feminist is helping a feminist to change the lightbulb, then to some extent that second person believes in the ability of women to do jobs which, at one point in time, were reserved exclusively for men.
All this makes one big assumption: that the initial feminist is in fact a women. It's entirely possible for men to be feminists too.
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