The DLH4 is extremely compact, yet with its dual-lens concept provides superb light output. With a 100W lamp in the flood position, its light output is greater than a 300W Fresnel studio fixture. In the spot position, it equals or exceeds a 1000W Fresnel studio fixture. The inexpensive lamps provide exceptional economy, coupled with outstanding life expectancy. The slide-control dimmers operate from 220-240 Volts AC.