Reply To: Split: Chidushim on Daf Yomi

שבת כא,א

The Tosfas Yeshonim on the side says that lighting on shabbos with bad lights we are worried that it might go out and he cannot relight it and he will disturb his shalom bayis.

שבת כא,ב

The Taz in O’CH 673,9 brings the Trumas Hadeshen that even if we light earlier on shabbos, if it goes out we don’t have to relight the candles otherwise how can we light with bad lights maybe they will go out and he will not be able to relight it when he was not yet yotzei the mitzva when he lit. The Ramban says that we don’t worry about the light going out on shabbos as it is not possible to relight therefore the chazal considered it an onas and never instituted a prohibition for that. The Rif brings a proof that כבתה אין זקוק לה from the fact that we can light on shabbos and uses a double expression that we don’t relight. Explains the Ksav Sofer that the Tur says that we don’t care that it might go out and he will relight it again on shabbos as we don’t have to relight it. He got the idea from the Rif’s words. He holds that from the weekday is no proof as being negligent to relight we don’t worry and to forget is an onas as follows.
Rashi says that on a week day he will be negligent and not relight it, why doesn’t he say that he might forget? The Pnei Yeshuah says that would be an onas as we mentioned by tefila SA O’CH 108 he can say two shmonei esreis if we procrastinated to daven mincha and then he forgot. Tosfas might hold that to forget is not an onas.