Bay seniors unwilling to brave the joy filled mobs circulating around the Union Square Christmas Tree, need not bother. Out at 3560 21st Street in the City Tom Taylor and Jerome Goldstein have set up their eye-popping display of holiday lights again this year. Til Dec 21.6-10 pm. Free. For a through listing of the 400 best home lighting extravaganzas in the state check out this holiday light site.