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When shot outdoors, tungsten film produces a strong blue cast, an effect which is often used purposely to create different color contrasts. In the motion picture industry the use of underexposed tungsten-balanced film in an outdoor setting is a common way of producing a " day for night " effect, whereby film shot during the daytime looks as if ...
The name "Tungsram" is a portmanteau of tungsten (/ ˈ t ʌ ŋ s t ən / TUNG-stən) and wolfram (/ ˈ w ʊ l f r əm / WUUL-frəm), the two common names of the metal used for making light bulb filaments. Before becoming nationalized by the Communist government in 1945, the company was the world's third largest manufacturer of light bulbs and ...
The continuous lighting uses tungsten bulbs with a colour temperature of around 3200 K instead of daylight-balanced (5500 K) flash tubes. All units accept the same range of light modifiers as the flash units, subject to the additional heat generated by the bulbs.
The Kelvin color temperature scale ranges from 1000K (amber) to 3000K (yellow) to 5500K (white) to 8000K (blue) to 12000K (purple). HID Lamp Color Temperature Range. HID lamps produce different colors of light primarily through the use of various metal additives in the lamp's arc tube and the physics of the gas discharge process. [11]
Incandescent lamps were initially developed primarily for indoor use, but major technology breakthroughs in 1907 and 1911 perfected the use of tungsten filaments. [1] From 1911 onward, electric incandescent lamps with tungsten filaments became an increasingly popular choice among municipal utilities for public street lighting.
Hiram S. Maxim was the chief engineer at the US Electric Lighting Co. [52] After the great success in the United States, the incandescent light bulb patented by Edison also began to gain widespread popularity in Europe as well; among other places, the first Edison light bulbs in the Nordic countries were installed at the weaving hall of the ...
With HMI bulbs, color temperature varies significantly with lamp age. A new bulb generally will output at a color temperature close to 15,000 K during its first few hours. As the bulb ages, the color temperature reaches its nominal value of around 5600 K or 6000 K. With age, the arc length becomes larger as more of the electrodes burn away.
"Getting more than 800 2-foot color-corrected T-8 tubes became a major issue, and none of the regular suppliers had enough in stock," recalled Mike Ambrose, the gaffer for the production team in Los Angeles. "Movietone stopped production of whatever bulbs it was making, retooled the plant and started manufacturing the T-8s we needed.
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