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Fluorescent_lamp-electronic_ballast_starter-movie_VNr°0001.ogv (Ogg multiplexed audio/video file, Theora/FLAC, length 3.2 s, 640 × 480 pixels, 3.66 Mbps overall, file size: 1.38 MB) This is a file from the Wikimedia Commons .
In addition to general lighting, special fluorescent lights are often used in stage lighting for film and video production. They are cooler than traditional halogen light sources, and use high-frequency ballasts to prevent video flickering and high color-rendition index lamps to approximate daylight color temperatures.
Ballasts for sign lighting in the United States, are heavier duty than other ballasts because the cooler outdoor temperatures increase the energy required to start a fluorescent tube. They are sized based on the total tube length used. Typical European 230V series choke ballast 40W T12 or 36W T8 fluorescent lamps.
The two major innovations of the unit were the high-frequency ballast, which gave the lights greater intensity and eliminated flicker commonly found in off-the-shelf fluorescent tubes, and the Kino Flo tubes, which contained a number of special phosphors designed to eliminate the characteristic tints in the magenta-green spectrum which are present in most domestic fluorescent lights. [3]
Compact fluorescent lamps are available in a variety of styles and shapes. Some have tubes and ballasts permanently connected, while others are separate allowing you to change the tube without changing the ballast. There are also CFLs enclosed in a glass globe, which look similar to conventional incandescent light bulbs.
A compact fluorescent lamp (CFL), also called compact fluorescent light, energy-saving light and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs.
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