We usher in the peace and sanctity of Shabbat by lighting candles every Friday evening and on the eve of Jewish holidays. The candles bring peace into our homes, and add light and warmth to a world that sometimes feels dark and cold. When to Light the Shabbat Candles: The candles are lit eighteen minutes before sunset. Some communities, such as those in Jerusalem, have the custom of lighting the candles and bringing in the Shabbat earlier. In that case, light the candles as per your community cu