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W
WALL SCONCE
A decorative and/or functional wall-mounted luminair.
WARP
The first zoom profile spotlight with ring control and 4 framing shutters which are fully rotatable.
WASH
- A lighting cover over the whole stage (e.g. "We'll use the red wash for the hell scene").
- 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 roplets.
WATTAGE
The measurement of the amount of power used by an electrical device. Lamps are rated in terms of wattage. Dimmers are rated in terms of their maximum load capacity in wattage. Wattage=Amperage*Voltage.
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.
- The distance between two corresponding points of a given wave. Wavelengths of light are measured in nanometers (1 nanometer = 1 billionth of a meter, or 1 X 10-9 m).
WHITWORTH
Pre-metric standard thread for bolts and associated fittings in the UK. (Pre 1972)
WIGGLE LIGHT
Somewhat derogatory term for an automated fixture.
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