This is joke without a punchline. The answer is simply "several."
Our story begins with a light bulb in need of changing.
It is inconveniently located at the peak of the barn roof,
which of course means that a ladder and a truck bed have to get involved,
neither of which proved very useful in reaching the light fixture.
But with one foot atop the gate rail and the other on the ladder and
my arms sufficiently wrapped around the roof trusses, I was able to unscrew the teeny tiny screws
holding the fixture together and reach the bulb without putting my life in jeopardy.
The good thing about these light bulbs is that they're very bright and last a very long time.
The bad thing is that they're hard to snap into place when reaching above your head
and standing on your tippy toes. And don't even get me started about the teeny tiny screws...
...because you know I had to drop one, then climb down from my perch and spend
a very long time looking for it, then climb back up and start all over again.
But, hey, at least I found it.
I know what you're thinking, so I'll say it for you. She's got a screw loose.
Anyway, so the lightbulb is changed, the fixture is back together, and I climb down again
to flip the switch and admire my work.
Bummer. Apparently the replacement bulb, which I had borrowed from
an unused fixture in the garage, was no good, or I had seated it incorrectly.
So I got to start all over again.
Are we having fun yet?
This time, I tested the bulb I would be borrowing before I installed it,
then I made sure it worked in the barn fixture before screwing the cover back on.
And then I stood back and admired my work.
Let there be light.