This 2012 photo released by Longwood Gardens shows a light sculpture by British artist Bruce Munro titled "Water Towers" at Longwood Gardens in Kennett Square, Pa. Munro will display this piece in an exhibition called "Light" at Cheekwood Botanical Garden and Museum of Art in Nashville, Tenn., in 2013. (AP Photo/Longwood Gardens, Corriette Schoenaerts)

This 2012 photo released by Longwood Gardens shows a light sculpture by British artist Bruce Munro titled "Field of Light" is shown at Longwood Gardens in Kennett Square, Pa. Munro will display this piece in an exhibition called "Light" at Cheekwood Botanical Garden and Museum of Art in Nashville, Tenn., in 2013. (AP Photo/Longwood Gardens, Corriette Schoenaerts)