The lights dimmed inside the Music Center at Strathmore in North Bethesda on Saturday afternoon as orchestral music stands, each fitted with small clip-on lights, softly illuminated the stage—the glowing orbs resembling a swarm of fireflies. Behind the orchestra, a large projection screen flickered to life with the title of the production, DreamWorks’ The Prince of Egypt. A low hum broke the anticipatory silence—a signal that the performance was…