ARRI M90: 9kW HMI spotlight, 6000K color temperature, 8°–55° focus range; standard for large-scale productions and daylight simulation.
Technical Details
The M90 operates with a 9,000-watt HMI lamp and reaches a color temperature of approximately 6,000 Kelvin. The electronic ballast typically weighs 45-60 kilograms and requires a 32-amp CEE connection at 400 volts three-phase. The lamp head itself weighs between 25-35 kilograms and features continuous focusing from spot (8°) to flood (55° beam angle). Common variants include the M90C (Compact) with an integrated ballast and the M90SE (Special Effects) with an expanded accessory system for gobos and color filters.
History & Development
The first M90 lights were launched by ARRI in 1982, based on HMI technology that Osram had developed back in 1969. In 1987, K5600 Lighting introduced the first flicker-free M90 for high-speed shooting. In the 1990s, electronic ballasts became standard, reducing weight by 30% and improving color consistency. Since 2010, LED arrays have increasingly displaced HMI lights in this power class, though the M90 remains indispensable for specialized applications.
Practical Use in Film
Ridley Scott extensively used M90 lights for the daylight scenes in "Gladiator" (2000) to simulate the Mediterranean sun. In "Blade Runner 2049" (2017), Roger Deakins employed M90 arrays to evenly illuminate the monumental exterior sets. The M90 is particularly suitable for large sets, green screen productions, and as a sunlight replacement through windows. For exterior shots, it serves as fill light or for illuminating shaded areas. Its high light output allows for shooting with small apertures for maximum depth of field.
Comparison & Alternatives
Compared to the smaller M40 (4,000 watts), the M90 offers double the light output, while the M180 (18,000 watts) achieves double that again but requires significantly more infrastructure. Modern LED panels like the ARRI SkyPanel S360-C achieve comparable light output with lower power consumption and no warm-up time, but cost three times as much. For controlled studio environments, many cinematographers now prefer LED systems, while the M90 excels in budget productions and extreme weather conditions.