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P
POLE OPERATION
A mechanical means whereby pan (horizontal rotation), tilt (up and down) and
focus of a lantern may be adjusted by a pole from floor level. Commonly used
in TV & Film studios where fast resetting of positions is necessary.
POWERCON
Power connector with the same body design as the SPEAKON speaker connector.
Manufactured by Neutrik. Used extensively on lighting patch panels (at least
in the UK) due to its smaller physical size.
PRACTICAL
Any object which appears to do onstage the same job it would do in life, or
any working apparatus (eg light switch or tap). Light fittings which have to
light up on the set are called Practicals.
PREFOCUS CAP
A type of lamp base which ensures that the filament is correctly lined up
relative to the reflector and lens.
PREHEAT / PRE-HEAT
Smoother lighting builds from zero are achieved when a lamp filament has
been warmed (at approx 15%) in the previous state. Preheating lamps MAY
prolong the life of the lamp by reducing the thermal "shock" of going to
100% instantly. It's good practice to preheat lamps where possible, and some
computerized lighting desks provide this function at the push of a button.
PRELUDE
Range of 500W/650W lanterns produced by Rank Strand (now Strand Lighting) in
the UK.
PRESET
1) Anything in position before the beginning of a scene or act (eg Props
placed on stage before the performance, lighting state on stage as the
audience are entering.)
2) An indepenently controllable section of a manual lighting board which
allows the setting up of a lighting state before it is needed. Each preset
has a master fader which selects the maximum level of dimmers controlled by
that preset.
PREVIEW
A function on some memory lighting control desks with video mimics. Preview
enables the operator to see the levels of dimmers and other information in a
lighting state other than that on stage.
PREVISUALISATION
Computerized tools which enable design teams to show directors and other
members of the production team how lighting or scenic automation will look
before the set is even built.
PRIMARY COLORS
The primary additive colors of light are red, green and blue, and the
subtractive colors are cyan, magenta and yellow.
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