Color temperature of 3200K produced by heated tungsten filament in incandescent lamps. Film industry standard for warm artificial light with CRI 95–100.
Technical Details
Tungsten lamps achieve 3200K by heating a tungsten filament to approximately 2800-3000°C, with the exact Kelvin value achieved through color filters or special filament designs. Typical wattages range from 150W (baby spots) to 20kW (brutes), with a continuous spectrum and no color spikes. The Color Rendering Index (CRI) for high-quality tungsten lamps is between 95-100. Modern LED variants emulate 3200K through RGB mixing or phosphor-coated blue LEDs, but often only achieve CRI values of 85-95.
History & Development
Thomas Edison developed the first practical incandescent lamp in 1879, but it wasn't until the 1920s that 3200K became the cinema standard, optimized for this spectrum by Kodak film emulsions. In 1932, ARRI introduced the first professional tungsten spotlights. The crucial milestone was the introduction of halogen-tungsten lamps in 1965, which offered more consistent color temperature and longer lifespan. Since 2010, LED panels with 3200K emulation have increasingly replaced classic tungsten fixtures.
Practical Use in Film
Kubrick's "Barry Lyndon" (1975) exclusively used candlelight and tungsten lamps for authentic period atmosphere. Cinematographer Roger Deakins strategically mixes 3200K spots with cooler light sources in "Blade Runner 2049" for contrast. Standard workflow: camera set to tungsten white balance (3200K), daylight is converted to 3200K using CTB (Color Temperature Blue) filters. Advantage: natural skin tones, warm atmosphere. Disadvantage: high power consumption, heat generation, short lamp life with overexposure.
Comparison & Alternatives
Compared to daylight (5600K), 3200K appears significantly warmer and cozier. HMI lamps (5600K) require CTO (Color Temperature Orange) filters for 3200K conversion, resulting in a 1.3 stop light loss. LED panels offer stepless color temperature adjustment from 2700K to 6500K without filters. Modern productions use bi-color LEDs for quick adjustments between tungsten and daylight. Plasma displays and OLED monitors as light sources also deliver a 3200K spectrum with lower power consumption.