Meet the first bona fide, white-light LED retrofit for the Source Four® ellipsoidal. Advance any full-size, tungsten Source Four ellipsoidal to LED efficiency in seconds, and without special tools. Same optics, same accessories, same flexibility as a Source Four fixture. As bright as a 575-watt, extended life HPL lamp. 70% less power, no re-lamping, no-hassle swap out.