In Louisiana the projection of messages both audible and visual is done by professionals. AV services refers to equipment that offers both an audio and visual component in its presentation. The AV projection systems are available for video, movies, slides, overhead transparencies and enlargers for photographic printing. A LED panels (light-emitting diode) may be used at outdoor location sites, as the brightness of the light makes images viewable in direct sunlight. AV services, projection systems and LED panels all are utilized for presentation and/or promotion in the entertainment industry.