On October 22nd, The Boston Cecilia will present the Boston premiere of James Whitbourn’s Luminosity as the centerpiece of a concert celebrating illumination in the time of darkness. Composed for the Westminster Choir College and the Archdream Dance Ensemble, Luminosity is scored for chorus, dancers, viola, tanpura and tam-tam. Conductor Colin Lynch had seen Peter Torpey’s elegant lighting design for the Boston Camerata’s performance of The Play of Daniel, and asked if Torpey would collaborate with Cecilia on Luminosity. I talked with Peter Torpey about his work and his plans for the concert.