Color temperature of 5600 Kelvin matching midday daylight; standard white balance reference for digital cameras. HMI fixtures naturally produce 5600K; LED panels achieve CRI values above 95.
Technical Details
The 5600K color temperature exhibits a Color Rendering Index (CRI) of at least 95, with professional film lights often achieving CRI values above 98. 5600K LED panels typically reach a luminous efficacy of 100-150 lumens per watt with a spectral distribution corresponding to CIE Standard Daylight D65. HMI (Hydrargyrum Medium-arc Iodide) spotlights naturally produce around 5600K and require electronic ballasts with frequencies between 25 kHz and 1000 Hz for flicker-free recording. Modern bi-color LEDs allow for stepless adjustments between 3200K and 6500K with a deviation of ±150K.
History & Development
The standardization to 5600K was established in 1931 by the Commission Internationale de l'Éclairage (CIE), based on measurements of midday daylight. Kodak established the 5500K standard for daylight films in 1935, which was later refined to 5600K. HMI spotlights, developed by Osram in 1969, revolutionized film lighting with their natural 5600K emission without color correction filters. With the introduction of digital cameras from 2000 onwards, the 5600K white balance became the universal standard, as sensors use this color temperature as a neutral reference.
Practical Application in Film
Cinematographer Roger Deakins used 5600K LED arrays in "Blade Runner 2049" (2017) for exterior shots to ensure consistent color reproduction between natural and artificial light. In mixed lighting situations, 5600K lighting is generated from 3200K tungsten light using CTB (Color Temperature Blue) filters, with approximately 40% of the light output being lost. DoPs use 5600K reference lights for "color matching" different light sources to minimize color deviations in post-production. Since 2018, Netflix productions have required all recording devices to be calibrated to 5600K for their HDR pipeline.
Comparison & Alternatives
Compared to 3200K tungsten light, 5600K lighting offers higher luminous efficacy with lower power consumption and heat generation. 6500K monitors surpass 5600K in their blue component and are suitable for HDR grading, but are too cool for shooting. ARRI SkyPanels allow for precise color temperature adjustments in 100K steps around the 5600K base value. For available light shoots under cloudy skies (6000-7000K), DoPs correct back to 5600K using 1/4 CTO filters to maintain consistency.