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W
WARP
The first zoom profile spotlight with ring control and 4 framing shutters
which are fully rotatable.
WASH
1) A lighting cover over the whole stage (e.g. "We'll use the red wash for
the hell scene")
2) A lantern which produces a large spread of softly focussed light (e.g.
the VL4 and Mac 600 are wash luminair).
WATER CRACKER
Device which produces a thin haze in the air by "cracking" water droplets.
WATTS
Unit of electrical power derived from the current (or "quantity" of
electricity) multipled by the voltage (or "pressure" at which the current is
delivered). Stage lighting equipment is rated in Watts (or Kilowatts - 1kW
being equal to 1000W). This refers to the amount of power required to light
the lamp. A higher wattage lamp requires more power and gives a brighter
light output.
WAVELENGTH
The distance from one point on a vibrating wave to the same point on the
next wave. The lengths of the sound waves (wavelengths) we can hear range
from one inch to 40 feet. High frequency sounds have short wavelengths (and
are more directional), low frequency sounds have long wavelengths (and are
less directional). In lighting terms, blue light is short wavelength, green
is medium and red is long wavelength. Beyond visible light are the short
wavelength Ultra Violet light and the long wavelength Infra Red light.
Wavelengths of light are measured in Angstroms.
WHITWORTH
Pre-metric standard thread for bolts and associated fittings in the UK. (Pre
1972)
WIGGLY MIRRORS
Slang for so-called "Intelligent" lights with moving mirrors.
WINGS
1) The out of view areas to the sides of the acting area.
2) Scenery standing where the acting area joins these technical areas.
WORKING LIGHTS
1) High wattage lights used in a venue when the stage / auditorium lighting
is not on. Used for rehearsals, fit-up, strike and resetting.
2) Low wattage blue lights used to illuminate offstage obstacles and props
tables etc. Known as Wing Workers.
WRENCH
American for SPANNER.
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