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Arri D25
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Arri D25

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Arri HMI spotlight with 2.5 kW output, 240,000 lumens, and 15–50° beam angle for exterior and large interior setups.

Technical Details

The D25 operates with an electronic ballast that enables flicker-free light output at 25,000 Hz. The fixture weighs 18.5 kilograms and features a Fresnel reflector with a diameter of 200 millimeters. The spot-flood adjustment ranges from a 15° to 50° beam angle. The system consists of the lamp head and a separate ballast, connected by a 7.5-meter cable. The average lamp life is 750 hours, with a light output of 240,000 lumens.

History & Development

Arri introduced the D25 in 1995 as part of the second generation of their HMI fixtures. It replaced the predecessor model D20 and offered improved electronics as well as higher light output. The development responded to the film industry's increasing demands for powerful yet portable daylight sources. In 2008, the D25 received an update with an improved ballast and optimized heat dissipation. The modern D25 Max version from 2018 integrates DMX control and remote functions.

Practical Use in Film

The D25 established itself as a standard for exterior shots and large interiors. In "The Revenant" (2015), the cinematographers used D25 units to enhance natural light in dark forest scenes. The fixture is particularly suitable for lighting dialogue scenes in daylight, where it serves as a key light or for filling in shadow areas. The separate ballast allows for flexible positioning, even in tight spaces. Typical workflows include use with diffusion frames like 4x4 meter butterflies or bouncing off white surfaces for softer light.

Comparison & Alternatives

Compared to tungsten fixtures of equal brightness, the D25 consumes 60% less power and generates significantly less heat. Compared to the smaller D12, it offers double the light output at only 50% higher weight. Modern LED alternatives like the Arri SkyPanel S120-C achieve similar light levels with variable color temperature but are three times more expensive to purchase. For mobile productions with low power requirements, HMI systems like the D25 remain the first choice due to their superior light output.

From the crafts

Perspectives

Cinematographer

Ich setze die D25 ein, wenn ich hartes, gerichtetes Tageslicht brauche, das stark genug ist, um durch große Diffusoren zu arbeiten oder Sonnenlicht zu matchen. Die Farbkonstanz bei 5.600K macht sie zur perfekten Ergänzung für Available Light, und mit dem separaten Ballast kann ich den Leuchtenkopf auch an schwer zugänglichen Stellen montieren. Das Gewicht von 18,5 kg erfordert allerdings stabiles Grip-Equipment.

Director

Mit der D25 kann ich harte Schatten und dramatische Lichtführung kreieren, die der Geschichte dient - besonders bei Thriller oder Neo-Noir-Produktionen. Die hohe Lichtleistung durchdringt mehrere Diffusionslagen, wodurch ich sowohl harte Key-Light-Situationen als auch weiche, flächige Ausleuchtung realisieren kann. Für Szenen, die emotional "kalt" wirken sollen, nutze ich bewusst die tageslichtähnliche Farbtemperatur.

Producer

Die D25 amortisiert sich durch niedrige Stromkosten und lange Brennerlebensdauer von 750 Stunden schnell. Ein Set aus vier D25-Units deckt die meisten Beleuchtungsanforderungen ab und benötigt nur einen 63A-Anschluss statt mehrerer Stromkreise. Die Anschaffungskosten von circa 8.000 Euro pro Unit sind kalkulierbar, und der Wiederverkaufswert bleibt über Jahre stabil.

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