Professional HMI light fixture delivering 12 kilowatts of daylight-balanced illumination for large-scale production lighting.
Technical Details
The D12 operates with a metal halide lamp and an electronic ballast that provides the required ignition voltage of 20,000 volts. The fixture weighs 8.2 kilograms and measures 350 x 240 x 460 millimeters. The die-cast aluminum housing ensures efficient heat dissipation with an operating temperature of the lamp at 6,000 Kelvin. The 175-millimeter diameter Fresnel lens allows for stepless focusing between 12 and 60 degrees beam angle. Arri offers the D12 in the D12 Plus variant with improved cooling and the D12/T for use with Tungsten filters.
History & Development
Arri introduced the D12 in 1987 as part of the first generation of compact HMI lights, after HMI technology was developed by Osram in the 1970s. The fixture quickly established itself as the standard for mobile film productions, as it was the first to offer daylight-balanced lighting in a handy design. In 1995, the revised D12 Plus version followed with optimized electronics and improved electromagnetic compatibility. Since 2010, Arri has supplemented its portfolio with LED-based alternatives, but the D12 remains in use due to its high light output.
Practical Use in Film
The D12 primarily serves as a fill light for exterior shots or as a key light in smaller interior spaces. Camera crews often use it to illuminate interviews or as background light when simulating natural daylight. In "Der bewegte Mann" (1994), cinematographer Gernot Roll systematically used the D12 for interior shots to contrast warm Tungsten lighting with cool "window light." The fixture is particularly suitable for run-and-gun productions, as it can be operated without a heavy tripod and directly from 16-ampere outlets.
Comparison & Alternatives
Compared to the larger Arri D25 (2,500 watts), the D12 offers lower light output but significantly better handling for battery-powered productions. Modern LED panels like the Arri SkyPanel S60-C achieve similar light output with continuous dimming and color temperature adjustment, but require larger light surfaces for comparable light intensity. Competing HMI lights such as the Dedo DLED12 or K5600 Joker-Bug 400W are positioned in similar performance classes but do not achieve the robustness and serviceability of the Arri design.