…Or at least a lot of them do, anyway.
spikeCount="10" all work as expected, but no odd number works properly and many even numbers result in having their results halved —
spikeCount="8" results in four spikes, for example. This was specifically tested on
diffraction (which yields the aforementioned incorrect results) and
lightning (which works correctly, even with odd numbers). Other styles might be affected differently.
spikeCount="0" should be a valid means of removing the spikes altogether. It currently isn’t, which might be related to the above. (Something like
spikeCount="0" on the
lightning doesn’t make any sense, sure, but that should be the modder’s problem if they really want to do it.)