Theatre Terms

image of question markHere you'll find over 1000 definitions of theatrical terms, from Aside, Beam Angle, and Camlock, to Upstaging, VU Meter, and Wagon.  Fully searchable, our glossary is helpful for technical staff, directors, actors, producers, or anyone wanting to better understand the inner workings of theatre.

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Term Definition Cross Reference Link
DISCHARGE LAMP A high-powered source of light produced by means of a discharge between two electrodes. An arc light, for example uses a discharge between two carbon rods which are manually or automatically fed together as they are burnt up. The use of this type of lighting is restricted to non-dimming applications such as followspots and projection, where dimming is achieved by mechanical means. Many of the new generation of moving lights use discharge lamps and diachronic filters.
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