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How long should the candles last?
What is The candles or the oil placed in the lamps must be enough to last ½ hour. If someone lit a menorah that did not have enough oil in it, he or she should relight the menorah, but without a new blessing. Most authorities hold that there is no extra hiddur—beautifica- of the mitzvah — in putting a lot of oil in the lamp. However, some say that nowadays, since people are out until very late at night, there is an extra beautification in having more oil in the lamp.