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F
FESTOON
Describes tabs which adopt a sculpted shape. A length of cable incorporating a number of lamp holders used for outdoor party lighting etc. Available in multi-circuit form so that the lamps can be "chased".
FIBER FRAME
A color frame made from heat resistant fibers, which doesn't get as hot to the touch as a standard metal frame.
FIBER OPTICS
A method of directing light down a very thin glass fiber. Fiber Optics are used mostly in communication, but find theater applications in star cloths which are black backcloths with the ends of optical fibers poked through, to create a mass of pin pricks of light. A large bundle or harness of fibers may be fed from one light source, sometimes with a motorized color or flicker wheel. New technology enables digital sound signals to be sent down optical fibers, replacing heavy and expensive multicore cables.
FIELD
Refers to the spread of light intensity across a beam. Most profile lanterns have an adjustable field. A Flat field has an even distribution, a peak field has a "hot spot" in the center of the beam. A flat field is essential when using gobos.
FILL LIGHT
- Light which fills the shadows that key light creates.
- Secondary to primary light source.
- A lighting design term which describes a light source or direction which is secondary, or fills in after a primary or key light source has been established.
FILTER
Electronic device to isolate and redirect specific frequencies in a speaker system.
FIRE EXTINGUISHER
Essential tools of the pyrotechnician's trade. In the UK, they used to be color-coded according to content (Carbon Dioxide (Black), Water (Red), Foam (Cream), Halon Gas (Green) Powder (Blue)) but now, they're all red with a small label saying what they are.
FIRST ELECTRIC
(US) The first LX bar upstage of the proscenium arch. (Known in the UK as LX1).
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