Shabbat candles are a significant part of Jewish tradition and are used in the observance of Shabbat, the Jewish day of rest, which begins on Friday evening at sunset and ends on Saturday evening. Lighting Shabbat candles is a mitzvah (commandment) and a symbolic act that marks the separation between the ordinary workweek and the sacred day of Shabbat.

Key aspects of Shabbat candles:

1. Shabbat candles are lit to bring light, warmth, and a sense of sanctity into the home, enhancing the spiritual atmosphere of Shabbat.
2. Typically, two candles are lit, symbolizing the dual commandments to remember and observe the Shabbat.
3. A blessing is recited when lighting the candles. The traditional blessing is: "Baruch atah Adonai, Eloheinu Melech ha-olam, asher kid'shanu b'mitzvotav v'tzivanu l'hadlik ner shel Shabbat." This translates to: "Blessed are You, Lord our God, King of the universe, who has sanctified us with His commandments and commanded us to kindle the light of the Sabbath."
4. Shabbat candles are usually lit just before sunset on Friday evening, typically 18 minutes before sunset. This is to ensure that the candles are burning well before the start of Shabbat.
5. The candles are typically placed on a special candlestick or candleholder. In some traditions, a separate candle, called the shamash, is used to light the other two, as it is forbidden to light a fire on Shabbat.
6. Shabbat candles symbolize the dual themes of remembering and observing the Shabbat. They bring warmth and light into the home and are seen as a reflection of the Jewish soul.
7. Lighting Shabbat candles is an important tradition for Jewish families. It is often a moment of reflection, prayer, and unity within the family.
8. Shabbat candles are allowed to burn until they extinguish themselves. It is considered an honor to let the candles burn until the end without extinguishing them.