Complex sentence: The same circuit will not work in a fluorescent torchiere for the same reason that it won't work in other types of fluorescent applications: namely, because the pulsing will cause the arc in the fluorescent tube to become erratic.
Split into simpler sentences: The same circuit will not work in a fluorescent torchiere for the same reason that it won't work in other types of fluorescent applications. Namely, because the pulsing will cause the arc in the fluorescent tube to become erratic.