Dedolight DLH4P Universal Spotlight with 26ft Cable - 100-150W, 12-24V This is a universal quartz halogen light head with new double aspheric lenses and zoom focus. It is dual-wattage -- 100 or 150 watt, and dual-voltage -- 12 or 24 volt, with the appropriate power supply. The optical system of the Dedolight surpasses the traditional concept of studio lights with fresnel lenses. The Dedolight optical system employs two lenses - neither of which is a fresnel. The second lens pre-collects the light, directing it to the front lens and minimizing light loss. This produces unprecedented focusing range and light efficiency, especially in the spot position.