Complex sentence: Tungsten-halogen incandescent lights which are brighter and more efficient and are very commonly used in theatrical and motion picture lighting and better color temperature characteristics are little used in street lighting due to their relatively short lifespan.
Split into simpler sentences: Tungsten-halogen incandescent lights are more efficient than regular incandescent lights, and are very commonly used in theatrical and motion picture lighting due to their higher efficiency and brightness and better color temperature characteristics. They are little used in street lighting due to their relatively short lifespan.