LIT, an annual light and projection arts festival, features colorful and environmental design illuminating different sides of the Courthouse Square, 7 p.m.,to 10 p.m., Downtown Huntsville. Enjoy lights moving to music, 3D mapped content, interactive video and light displays. LIT is free and open to the public. Event in partnership with UAH, ARTSHUNTSVILLE.ORG and Downtown Huntsville, Inc.