The Bnei Yisschar brings down that for barren women it is a special time during Channuka and especially zos channuka (http://www.hebrewbooks.org/pdfpager.aspx?req=4683&st=&pgnum=120&hilite=). The Gemara in Shabbas(23B) itself brings down a segula of having children who are talmidim chachmim by lighting as Rashi brings down from Mishlei(6) ner mitzva v’Torah ohr,ner mitvah = Shabbas,and channuka = Torah ohr.
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