Mishna B'rura 264:1 says: The reason for the invalidity of [certain] wicks and oils [for the Shabas lights] is that they do not shine well and we're afraid he may tilt the lamp so the oil within ...
I'd be very interested to know if anyone has definitive advice on which types of light bulbs are considered an issur d'rabbanan (Rabbinic prohibition) vs an issur d'oraita (Torah prohibition) to turn ...
What is the reason for the candles or lights lit on the desk of the chazzan (prayer leader)? In a shul today I saw candles lit on a table at least 6 feet from the reader. Does that fulfill the ...
We know that there are those who light chanukah candles at sunset and other at tzeis but there are some poskim lighting between at an intermediate time, for example : Rav Moshe Feinstein, Rav ...
I once heard that there is a source that says the Greeks invented gas lamps or some sort of street lights which enabled the Jews to roam the streets at night and not be with their families. The plan ...