first two years of college and save thousands off your degree. Profiles include four beam-shaping metal shutters, a gate to take an iris or gobo and an adjustment to make the beam smooth and even ('flat') or hot in the centre ('peaky'). Not only does light illuminate the action you’re watching, it also directly affects the emotion and and subtext of a scene. 1) Moving Head: A luminaire is mounted on a moving yoke which can pan side to side and can tilt the luminaire through a range. Shortened to Scaff. 'Focus that spot offstage a bit please') See also CP, T, P2, K. (UK) The Association of British Theatre Technicians, which was formed in 1961 as a charity, to provide a forum for discussion among theatre technicians, architects and managers of all disciplines, and disseminate information of a technical nature, to all its members. FADE TIMESOn computerised memory lighting control desks, a lighting fade can have two times - an up fade and a down fade. See also GROUNDROW. Lighting Industry Forum code which identifies the (original) recommended usage of different lamp types. Also known as ERS / E.R.S. Glass colour filters which reflect all light except that which is the colour of the filter, which passes through. Today’s stage lighting tools are a heady combination of technology and creativity and truly allow designers to let their imaginations take flight. Originally designed in 1933 by Joseph Levy and Edward Kook, the founders of Century Lighting (later Strand). 1) Originally "tableaux curtains" which drew outwards and upwards, but now generally applied to any stage curtains including a vertically flying front curtain (house tabs) and especially a pair of horizontally moving curtains which overlap at the centre and move outwards from that centre. Another great leap forward !. Some Flash buttons on submasters can be set to latch (ie they stay on when pushed, until they are pushed again). Short for Electrics. See Halogen Cycle. ER / E.R. (Trade Name) Thin black aluminium product which is used to temporarily mask light coming out of a luminaire's body, or to control spill. Also used when an object is being dropped from above. A Series splitter is also available where a voltage is shared equally between two loads. Ellipsoidal spotlights produce a bright beam with features allowing technicians to adjust the focus from sharp-edged to diffused and attachments to hold patterns and gels. 15A PLUG It also composes one of the most technical and complicated systems in a theater. there is a breakout box at the end of a sound multicore cable which allows you to plug microphone cables into it). The position of a shutter in the light beam is known as the shutter cut. To learn more, visit our Earning Credit Page. Sometimes a beam light or other lantern may be used in the same way. An AC cord or cable is used to connect between a mains power socket and a piece of equipment. A higher wattage lamp requires more power and gives a brighter light output. Moving lights use a range of different gobo sizes, so check the manufacturers website. US = Upstage, USC = Upstage Centre. Abbreviated to DC. Channels, usually controlled from the lighting desk which are switched, rather than dimmed. A KK Wheel is known in the US as LOBSTERSCOPE. Function on ETC lighting desks which allows you to remove a channel from a 'live' lighting state at a preset speed. Many lighting bars are internally wired (and are known as IWBs or Internally-Wired Bars), featuring cabling inside the bar and sockets mounted at regular intervals along the bar, and a connection box at one end to enable the bar to be plugged into dimmers. Only related to theatre in connection with the musical 'Tommy'. A bounce doesn't need to be seamless, whereas a cyclorama should be. Greatly facilitates the drawing of lighting plans.Lighting Stencils on the Backstage Heritage Collection. Wikipedia entry. Touring shows sometimes use a floorcloth marked out with focus information to aid speedy focussing in a new venue. See also A1, T, P2, K. CRACKED OILA smoke effect which creates a haze in the air to make light beams visible. Show Control T coded lamps are for theatrical use, and have a colour temperature of 3000°K. Dimmable stage lights traditionally use tungsten filaments in a halogen gas (known as Tungsten Halogen lamps). CHANNELA complete control path for signals in lighting or sound equipment.In a lighting desk, the channels are directly controllable by the lighting operator. However, the highest risk is due to a flown lantern being struck by a piece of scenery or another lantern as it flies past. Distinct from a 'Techie' who may also be a carpenter or stage crew member. Often drawn from the theatres' groundplan. To change the lighting rig after the last performance of one show to the positions for the next show. See also CP, A1, T, P2. (US) Short for Ellipsoidal Reflector Spot. Frosts are commonly used in profiles in front of house positions to achieve the same beam edge quality in all lanterns. A 'STANDBY' (UK) or 'WARN' (US) cue is given first, so that the operators are ready for the actual cue. The lighting operator for a show is said to be "on the board", and is sometimes known as the "board op". THREE POINT LIGHTINGAn approach to traditional stage lighting taught by Stanley McCandless which uses two front lights (separated by 60 degrees horizontally) and one backlight to cover each lit area of the stage. Metal which heats up and glows white hot when electric current runs through it. A number of individual lighting dimmer circuits built into a single case. A rehearsal call for the next day / week used to be posted on a Call Sheet on the stage door noticeboard, but is now often an online document, updated by the stage management team. Plastic stencil containing a range of scale symbols for current lighting equipment. This terminology is beginning to change, as it's not very subtle, and sometimes isn't as clear as it could be. Two people are used to move and steady the tallescope. ELEVATIONA working drawing usually drawn to scale, showing the side view of a set or lighting rig. 2) A lighting position above the auditorium, commonly with a catwalk above it to access lighting equipment and electrical systems is known in Dutch as a Zaalbrug. 3) An independently controllable section of a manual lighting board which allows the setting up of a lighting state before it is needed. 'Can you patch circuit 12 into dimmer 18 please'). The height above or below an arbitrary point in a building (generally the stage floor). ~ CHEAT SHEETA smaller version of the lighting plan, used by the lighting designer during the lighting plot. BLIND PLOTTINGThe facility on some lighting control desks for the operator to make changes to the stored lighting cues without affecting the state on stage. "Sarah exits 2L"). Blue working lights backstage should remain on and are not usually under the control of the board, except during a Dead Blackout (DBO), when there is no onstage light. 1) The command given to technical departments to carry out a particular operation. Also known as LEKOLIGHT. 2) An extra lighting state added into the sequence later. a strobe should operate at less than 4 flashes per second, or more than 50 flashes per second). Properly designed alarm systems incorporate timed isolation, so that smoke detectors are only off for a specific period, and automatically come on after that period. Earn Transferable Credit & Get your Degree. Used with an objective lens to produce the desired size of image. Theatrical Flash - a flash and a cloud of smoke Background light. (e.g. 1) The setting of a light or sound control channel. The groundplan shows all items standing on the stage floor and any permanent items which will affect the production, and the position of any flown pieces. See also FLOATS. LIGHTING PLOT1) The process of recording information about each lighting state either onto paper or into the memory of a computerised lighting board for subsequent playback. BURNT OUTA coloured gel that has lost its colour or melted through due to excessive heat in front of a lantern. A diffusing filter used to soften the edges of a light beam. Alternative clamps are available from companies such as Doughty to rig a lantern above a bar. Used for rigging lanterns, focusing etc. CHECK1) Opposite of Build; a smooth diminishment of light or sound level (e.g. If the location of that item is moved (e.g. Usually done from the prompt corner by the DSM on the book or Stage Manager over cans. Anyone can earn FLASH PAPERFlash paper is fast-burning nitrocellulose (Cellulose Nitrate) which is used by stage magicians to produce a flash of flame safely. There are standalone units designed to chase lighting circuits electronically in time to music (sound to light) or mechanically as a repeated sequence (as used in early neon signs). Made by Rosco, Heat Shield is a special clear gel which when placed between a lamp and a coloured gel, dissipates a large amount of heat to give the gel a longer life. 2) The equipment connected to a dimmer. 2) The process of putting any part of the production into its' starting position / setting. Standard power connector in UK theatres. (especially TV and Film lighting) Light which fills the shadows that key light creates. Used heavily for dance lighting as it lights the body of the performer without casting shadows upstage, and it is far more sculptural than front light. A running brail was a breast which allowed the flown piece still to fly in or out, in its new position. Often used in conjunction with LEGS. Some desks which use Tracking only record changes, which means dimmers (or moving lights etc) stay where they are until they're specifically changed. Shutters: moveable attachments that cover part or all of a fixture to control the output and shape of the light beam. A view from the side of the set (or a piece of scenery) is known as an ELEVATION. Three round metal contacts (live, neutral and earth); the principal difference from the domestic 13A connector is that the 15A version has no fuse. 2) A signal from one system to another is also known as a feed (for example, an audio signal from the FOH desk to a TV company videoing a concert is known as a feed. from a battery). STATEIn lighting terms, a lighting 'picture' ; each lighting cue results in a different state (or a modified state). Bunch of cables tied or taped together into a single unit. Lighting designed to illuminate an object from behind, which causes an appealing glow effect around its edges. B size - 86mm / 64.5mm SMOKE DETECTORS The word originates from the Greek for fire, pyr. However, it can complicate things if you are plotting cues out of sequence. (e.g. Sometimes called Cannons after the original manufacturer. NON DIMSChannels, usually controlled from the lighting desk which are switched, rather than dimmed. SCENE1) A pre-programmed lighting state which can be faded in and out during a one night show when there's no time for plotting. Fully searchable, our glossary is helpful for technical staff, directors, actors, producers, or anyone wanting to better understand the inner workings of theatre. ZOOM PROFILEA type of profile lantern with two lenses enabling the adjustment of both size of the beam and whether it's hard or soft focus. He developed the lens for French lighthouses so that they could be seen further out to sea and could achieve a longer focal length with a lot less glass than a standard plano-convex lens. 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