The Lawrence Chamber Orchestra hopes to create an atmosphere of old-world charm with its annual "Baroque by Candlelight" concert. The romantic evening, always scheduled near Valentine's Day, will feature Boccherini's Cello Concerto in B flat, William Boyce's First Symphony and the First Suite from Handel's "Water Music." A post-concert reception with the musicians and artistic director Steven Elisha will offer a dessert, wine and beverage buffet. Tickets are $30 each, $50 a pair, or $15 for children 12 and under and are available by calling 843-2787 or at the door starting at 6:30 p.m. The melodies begin at 7:30 p.m. Saturday at Trinity Episcopal Church, 1011 Vt.