Could you please give me the Makor for saying the Bracha of Shehecheyanu for a Kallah that lights the first time in her life Shabbat candles?
There are some places were a woman says the Brachah of “Shehecheyanu” when she lights candles the first time after her marriage. The Shemirat Shabbat Kehilchatah 43; 42. brings the source, the Yavetz in his Siddur. The Shemirat Shabbat adds that if there is no prevailing custom in the place – she should not make the Brachah, but if she wants to, she may wear new clothing or place a new fruit on the table, and then she may say the Brachah of Shehechiyanu. If her custom was to light candles prior to her wedding, she should not say the Brachah of Shehechiyanu on her first lighting after the wedding. [שמירת שבת כהלכתה פרק מג סעיף מב ובהערות]