This is no ordinary par can. Source Four® PARs™ stand out of the luminaire crowd with their rugged die-cast aluminium construction and acclaimed Source Four optical technology.Superior brightness and energy savings. Source Four PARs deliver a smooth even field, and at 575 watts are comparable to 1000W PAR64s -- while saving 40% on energy. Need maximum brightness in wash lighting? The Source Four PAR is rated for the incomparable 750W HPL lamp. Changing beam angles is easy: Source Four PAR comes with a set of four snap-in lenses that mount in a cool, rotating ring.