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C
CONTROL ROOM
Room at the rear of the auditorium (in a proscenium theater) where lighting and sometimes sound is operated from. Known in the US as the BOOTH. The stage manager calling the cues is very often at the side of the stage (traditionally stage left) but in some venues he/she may be in the control room also. The control room is usually soundproofed from the auditorium so that communications between operators cannot be heard by the audience. A large viewing window is obviously essentialas is a "show relay" system so that the performance can be heard by the operators. Obviously if sound is being mixedthe operator should be able to hear the same as the audience so some control rooms have sliding or removable windowsor a completely separate room for sound mixing. Where possiblethe sound desk is moved into the auditorium so that the operator can hear the same as the audience.
CONTROLLER
- Any remotely located device used to activate dimmers or fixture functions.
- A lighting control console or light board. Common types include the preset board, the computer memory consoleas well as specialized automated fixture controllers such as the Vari-Lite Artisan II console.
CONVENTIONAL LIGHTING FIXTURE
A standard lighting fixture such as a PAR canFresnelor ERSwhich offers no built in automated functions.
CONVEX
Lens shape. Edges are thinner than the center of the lens.
COVE
US for front of house catwalk lighting positions. Also "Balcony Rail".
CP
Lighting Industry Forum code which identifies the (original) recommended usage of different lamp types. CP coded lamps are for FilmTelevision and Photographic studio use and have a color temperature of 3200°K.
CRACKED OIL
A smoke effect which creates a haze in the air to make light beams visible. This effect is rarely used nowbecause it has been found to be carcinogenic.
CRACKED OIL FOG MACHINE
A simple type of fog machine which atomizes oil into a fine atmosphere usually by introducing compressed air into a reservoir containing mineral oil. Crackers are also available which crack water into a very fine mist. Haze machines produce effects similar to oil crackers without leaving an oily residue on surfaces.
CRESCENT WRENCH
(US) A open ended adjustable hand wrench originally produced by the Crescent Tool Co. Known as a C-WRENCH.
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