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B
BLACKLIGHT
Lighting fixture producing ultra violet light that makes luminescent
material glow in the dark.
BORDERLIGHT
A multi-lamp strip containing one or more color circuits. Also referred to
as X-ray; Strip Light or Footlight.
BLACKBODY
A temperature radiator of uniform temperature whose radiant exitance in all
parts of the spectrum is maximum obtainable from any temperature radiator of
the same temperature; Correlated color temperature (CCT) correlates with the
apparent color of a blackbody radiator at a given temperature
BLACKOUT (B.O., B/O)
A lighting design term referring to a light cue which takes the stage
quickly into darkness. A blackout is often abbreviated B/O.
BOX TRUSS
An aluminum or steel support structure often used for temporary rigging of
lights, scenery, or sound equipment. As the name suggests a box truss is
rectangular in shape creating a rigid structure which is easy to stack and
load onto a truck. An additional advantage of box truss over other truss
shapes is the ability to hang lighting instruments inside the truss, where
they can remain protected while in transport.
BREAK-OUT
A cable connecting device which breaks a multi-circuit cable (multi- cable)
into individual circuits.
BRIDLE
A rigging device or method which distributes a single point of a load to
more than one hanging point.
BUMP BUTTON
A momentary switch or button on a lighting control console which brings a
channel to a level of full when pressed. Bump buttons allow rapid manual
control over lighting control channels. On some consoles bump buttons can be
put into solo mode where all channels except those controlled by the bump
button go out.
BUMP CUE
A lighting cue which happens instantly (Time=0). Bump cues are traditionally
used to emphasize similar abrupt changes in music, choreography, or to mark
the end of a scene. A bump cue where all lights go out is called a blackout.
BACK-UP
A section of a lighting control board (sometimes a separate unit) which
provides an alternative method of control should the main board fail.
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