There are many differences between LED PAR cans and traditional par cans. LED PAR cans use numerous LED bulbs whereas a traditional par cans use a single lamp. LED PAR cans do not require gels or gel frames which are typical in adding color to regular PAR cans. LED PAR cans often have built in features, such as strobes and dimmers, that would ordinarily be absent from traditional PAR cans. LED PAR cans typically give off less heat than traditional PAR cans. For more information on this question consult the article http://bulbamerica.blogspot.com/2010/06/stage-in-whole-new-light-led-par-cans.html on our blog.