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Lumen - In physics, specifically photometry (optics), the lumen (symbol: lm) is the SI derived unit of luminous flux. It is the amount of light that falls on a unit spherical area at unit distance from a sour. Used . ce of one candela. In steradians this is equivalent to the amount of light that falls on a unit solid angle from a light source of one candela. Alternatively, one lumen is the total light pro. Used . duced by an isotropic light source of (1/4p) candelas. A 100 watt incandescent light bulb will output around 1500 lumens. ...

Color Changers - A conventional lighting fixture with a remotely controlled colored changeable filter over the lens. There are three kinds of mechanisms used in color changers, a wheel with lens sized holes into which. Used . colored gells can be placed, multiple fixed filters that can be moved in and out of the beam to mix the colors and a scroller which uses continuous, usually dichroic, filters to mix an even . Used . greater number of colors.



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Preset Boards - Preset boards are the most basic lighting consoles - and also the most prevalent in smaller installations. They consist of two identical fader banks, called 'scenes.' The faders (control slides) on th. Used . ese scenes can be manually adjusted. Each scene has the same number of channels which control the same dimmers, but only one is live at a time, so the console operator can build a scene, then. Used . fade to it. These scenes are often referred to as A-scenes and B-scenes, and a cross-fader is used to fade between the A and B scene.

Generally, a preset board operator has a cue sheet for each s...

Large Format Mixers - Large format mixers are audio mixers having more than 24 channels for input/output.. Used . . Used . ...

Audio - Audio is the science and art of recording or reproducing sound through mechanical or electronic means. The field includes many disciplines, such as electrical engineering, acoustics, and music with de. Used . sign, installation and operation of sound recording and reproduction equipment as the focus. . Used . ...