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T
TUNGSTEN HALOGEN LAMP
A classification of incandescent lamps in which the quartz glass envelope
(or bulb) is filled with a halogen gas. Advantages over standard
incandescent lamps include longer lamp life and the ability to create much
more compact filament designs. Tungsten-halogen lamps typically burn at much
higher temperatures than their plain incandescent counterparts.
TORCHIERE
An indirect floor lamp sending all or nearly all of its light upward.
TRANSFORMER
Transformers are electrical devices with no moving parts, which change
distribution voltages to higher or lower levels. When used with incandescent
or halogen lamps, they typically step 120-V distribution downward to 12V,
although 5.5V and 24-V models are also offered.
TRANSLUCENT
Transmitting light diffusely or imperfectly.
TROFFER
A recessed luminair that is installed in the plenum with the opening flush
with the ceiling. Typically rectangular or square in shape, as in a 2-foot
by 4-foot luminair.
T CODE
Lighting Industry Forum code which identifies the (original) recommended
usage of different lamp types. T coded lamps are for theatrical use, and
have a color temperature of 3000°K.
TAB DRESSING
Lighting focused onto the front tabs to before the show starts.
TAILS
Also known as BARE ENDS, TAILS refers to a cable or set of cables with a
connector at only one end which is used for connecting a company's equipment
directly to the mains supply in a venue. The connection should only be made
by a qualified electrician with the power off!
TALLESCOPE
A retractable alloy vertical ladder on an adjustable wheeled base. The
platform at the top is just large enough to hold one person. Used for
rigging lanterns, focusing etc. Collapsible enough to fit through a standard
doorway. Outriggers are used to stabilise the tower from falling sideways.
Two people are used to move and steady the tallescope. Sometimes known as a
"TALLEY".
TECHNICAL REHEARSAL
Usually the first time the show is rehearsed in the venue, with lighting,
scenery and sound. Costumes are sometimes used where they may cause
technical problems (eg Quick changes). Often a very lengthy process. Often
abbreviated to the Tech. A DRY TECH is without actors to rehearse the
integration of lighting, scenic changes etc. It follows that a WET TECH is a
full technical rehearsal with actors and all technical elements, although
this term isn't used as often as DRY TECH. A PAPER TECH is a session without
the set or actors when the technical and design team talk through the show
ensuring everything's going to work as planned. Stage Managers can use this
session to ensure all is written correctly in the Prompt Book.
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