[Avodah] Sparks and motors

[aryeh gielchinsky]

> The "halakhic" spark is the oxidation or destruction of material. The
electric spark is the
> result of the movement of quantities of electrons through the air.  Both
cause light.
> Can one learn the halakhic category of the electric spark, assur or mutar,
from
> comparison with the other phenomenon?

I would think "halachik" sparks (in which some metal is being
"consumed") are more similar
to a regular fire than electrons jumping across the air which
don't "consuming" anything.
Has anyone seen any sources on lightning in connection with fire? Such as
saying boreh mi'oriah ha'esh
by havdalah?
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