This is a Dedolight DLH4 universal quartz halogen light head with double aspheric lenses and zoom focus. It is dual-wattage — 100 or 150 watt, and dual-voltage — 12 or 24 volt, with the appropriate optional 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.