For example, a sports arena will want to concentrate light onto playing surfaces to give athletes the best opportunity to see the fast action and fine details of the play that is progressing around them, without stray beams blinding spectators in the stands. Large outdoor parking lots will prefer lighting that illuminates the entire lot uniformly, with no dark areas or shadows that might make motorists uncomfortable. The specific application will therefore define the optics that will go into the application’s lighting system.