The DaPonte String Quartet presents its February concert series, “Winter Light,” with a string trio version of the monumental “Goldberg Variations” by Johann Sebastian Bach.  The group’s realization for string trio is based on two separate trio arrangements, by Dmitry Sitkovetsky and Annette Bartholdy, then further modified by the quartet’s members to remain as faithful as possible to Bach’s keyboard original. This candlelight concert is at St. Paul’s Union Chapel, 1055 Dutch Neck Rd., Waldoboro, Me 04572