Upgrade to our Ambiance Lx LED Festoons from our 5w Xenon Festoons and realize an energy savings of over 80% without compromising light output. Ambiance Lx LED Festoons are dimmable on magnetic and electronic low voltage systems. For magnetic systems, a standard incandescent or magnetic low voltage (MLV) dimmer can be used. For electronic, an electronic low voltage (ELV) dimmer is recommended.