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G
ANGING
Combining 2 or more fixtures into a single circuit.
GEL
Color filter.
GROUP RELAMPING
Group relamping entails replacing all of the lamps in a system together
after a fixed interval, called the economic group relamping interval. Group
relamping can reduce the cost of operating a lighting system while keeping
illuminance levels close to the design value.
GATE
A place within the optical train of an ERS where shutters, gobos, or other
items can be sharply focused by the unit.
GEL
A term used loosely to describe expendable color filters used in stage
lighting. Originally made of thin sheets of dyed gelatin, color filters are
now made from polymer plastics.
GEL STRING
A series of color filters connected end to end used in a color scroller.
GOBO
Also called a pattern, template, or cookie, a gobo is commonly an etched
steel cut-out placed at the gate of an ERS which produces a pattern of light
and shadow in the beam of light. Patterns are commercially available from
theatrical lighting dealers or can be made by hand using a number of
different processes. Many automated fixtures employ a variety of gobos and
gobo effects. These include rotatable gobos, gobo combinations, glass
colored gobos, or even sophisticated imaging systems which combine dichroic
color effects with patterns or custom designs or artwork.
GAFFA TAPE
Ubiquitous sticky cloth tape. Most common widths are .5" for marking out
areas and 2" (usually black) for everything else. Used for temporarily
securing almost anything. Should not be used on coiled cables or equipment.
Originally known as Gaffer's Tape, from the Gaffer (Master Electrician) on a
film set.
GALAXY
Large computerized memory lighting desk. Previously manufactured by Rank
Strand (now Strand Lighting)
GAM
USA based manufacturer of lighting gels, gobos and accessories. GAM stands
for Great American Market.
GAUZE
Cloth with a relatively coarse weave. Used unpainted to diffuse a scene
played behind it. When painted, a gauze is opaque when lit obliquely from
the front and becomes transparent when the scene behind it is lit . Many
different types of gauze are available; Sharkstooth gauze is the most
effective for transformations, because it is the most opaque. Vision gauze
is used for diffusing a scene and for supporting cut cloths. Also known as a
Scrim.
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