[Avodah] electricity and shabbat

[Eli Turkel]

<<Permit me to add an electric stove/oven is generally considered "aish"
mamash or for Shabbos at least a "tol'dah". Either way AIUI both
incadescent bulbs and red-hot filaments would qualify as d'oraissos.>>

Not as clear as it sounds. An electric stove is used to cook food.
When turning on an incadescent lamp only a filament not food is heated.
True the gemara lists heating metal as a tolada of bishul but there the
purpose was to soften the metal which is not the purpose if heating
the lamp filament.

I am not an expert in flourescent lamps but am under the impression that
LED lights do not involve any issur beyond the basic electricity machloket.
Hence, according to RSZA it would seem that the prohibition is based on
accepted minhag.
Of course this makes a big difference in various beideved questions or
medical questions

I don't think that RSZA ever mentions it but according to his shita it
would seem that if one turned on a fan (or possibly an LED as above) in
an unusual manner then it is 2 derabanans which is allowed for a mitzvah
including oneg shabbat (eg it is very hot). I again stress that I haven't seen
anyone mention such a kulah but it seems to follow standard principles.


-- 
Eli Turkel