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Misc. Lighting Terms/Facts
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75
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Undergraduate 2
10/10/2012

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Term
Alley
Definition
onstage, area b/t each "leg"
Term
Ante Proscenium ("AP")
Definition
used to describe things that lie beyond the proscenium arch, closer to audience
Term
Candelabras
Definition
small lamps used in chandaliers
Term
Catwalks
Definition
walkways above the audience, numbered 1-3 beginning at the stage
Term
Cycclorama ("Cyc")
Definition
large, neutral-colored sheet that runs across the back of the stage onto which lights are projected
Term
Fill
Definition
a light that fills in shadows
Term
Fire Curtain
Definition
safety device directly behind the Plaster Line, drops down to keep smoke from audience and opens vents above the stage allowing smoke to escape, once made with asbestos
Term
Galleries
Definition
tech galleries are located on each side of the stage, house spotlights and other equipment
Term
Gobo/Pattern
Definition
inserted into a light to throw an image onto the stage (example: tree branches, windows), only works with ERS
Term
Grid
Definition
area above the stage where most of the loading (of weights, scenery, lights, etc.) occurs, 60 ft above OBT stage
Term
House Curtains ("The Main Rag")
Definition
the primary curtain, which closes before and after, & b/t acts or scenes
Term
Incandescent lamp
Definition
~we typically think of this as a lightbulb
~filaments heats up, glows & reacts with glasses in a bulb
~higher wattage = bigger lamp
~5+ watts for stage
~aforementioned chemical reaction causes carbon to build up over time turning the bulb gray
Term
jumper
Definition
proper stage lighting term fo an extension chord
Term
key
Definition
dominant light source
Term
lamp/luminary
Definition
term used in place of "lightbulb"
Term
Masking
Definition
curtains that help adjust sightlines, preventing the audience from seeing electrics, scenery, costume changes, etc.
Term
Pigtail
Definition
electrical cord attached to lamp
Term
plano-convex lenses
Definition
one flat side, one bowed or "convex" side
Term
Plaster Lines
Definition
official "edge" of the stage, right at the proscenium arch (doesn't include apron); all upstage and downstage measurements are taken from this
Term
Proscenium Arch
Definition
the stage's "frame"
Term
teasers/borders
Definition
horizontal masking curtains hiding lights over the stage, could also hide incoming flies (controls the sightline)
Term
tormentors/legs
Definition
controls sightline of the wings by masking curtains which conceal actors preparing to enter as well as set pieces preparing to enter
Term
tungsten-halogen lamps
Definition
~small/light/fragile
~oil from skin can cause glass to bubble up like tumor & ultimately explode
Term
sidelight
Definition
most revealing/sculpting form of light; lit from the side' dancers love this kind of light; makes a thin person look more obviously thin, a fuller person more obviously full
Term
sightlines
Definition
way in which the audience is arranged so as to prevent them from seeing backstage activity
Term
Ellipsoidal Reflector Spotlight (ERS)
Definition
reflector shaped like an ellipse, light produces as "F1" and then reflected at "F2" (see book for illustrations), long distance throw, has shutters
Term
Source 4
Definition
primary type of ERS in our theatre
Term
fresnel
Definition
originally developed for lighthouses, contains a spherical reflector, has a sled/carriage connecte to a focus knob, shorter throw
Term
parabolic aluminized reflector lamp ("PAR")
Definition
parallel beams, often used as headlights for cars, aircraft landing lights, basically a lightbulb in a tin can, used in concert lighting, measure in 1/8 inches
Term
Parnel
Definition
combines the attributes of Fresnal and PAR, oval-shaped, no shutters
Term
lamps are identified by
Definition
~size
~shape
~base
Term
warm & colors often paired together. why?
Definition
one color acts as dominant (key) & other as the recessive (fill)
Term
cons of too-low intensity & too-high intensity
Definition
too low---doesn't read. too high---washed out performers
Term
front lights
Definition
help blend multiple colors & also acts as "eye-popper"; coming from a source straight ahead that perhaps help blend key & fill lights on a performer and also makes their eyes really stand out
Term
backlight
Definition
creates "halo effect"; hung behind and above performer
Term
barndoor
Definition
an external attachment added onto a lighting instrument that doesn't have shutters & shapes a beam of light
Term
ante-proscenium
Definition
the lighting positions within the audience area
Term
rock spot
Definition
car headlight in a tin can, lightweight, durable, a PAR
Term
1st electric
Definition
furthest downstage flown lighting position
Term
cyc cell
Definition
lensless lighting instrument for lighting the cyc; can be single/grouped in 2's or 4's
Term
strip light
Definition
used for lighting the bottom half of the cyc and can be used where full lighting washes are needed
Term
to circuit
Definition
plug in a light source
Term
light from below
Definition
gives the performer a dark/demon-like effect. makes them seem frightening or scary
Term
Twofers
Definition
adapt one male plug to two female plugs
Term
AC
Definition
~Alternating current
~flow of electricity that moves forward and backwards, alternating periodically.
~U.S.: we use a standard of 110 volts (multiplied by whole numbers with each increase)
Term
DC
Definition
Direct current, like a battery.
Term
most economical conductor
Definition
copper, but it is expensive currently
Term
aluminum
Definition
~became more economically favorable, but broke down as it conducted electricity
~aluminum wiring led to a large amount of electrical fires
Term
W=VA
Definition
Watts = Volts • Amps
Term
The 3 basic components of electricity are
Definition
the source, the path (circuit/conductor), and the user
Term
Silicon Core Rectifier (SCR)
Definition
~controls the current sent to a light
~Two are used per light. The electronic dimmer was hooked up to the computers.
Term
When we put a gel in front of a beam of light
Definition
we are filtering the beam of light. A red gel, for example, filters out all other wavelengths except for red (allowing only red light to hit the stage).
Term
In light, the three primary colors are
Definition
blue, red, and green
Term
The three primary colors combine to make
Definition
near-white light
Term
Light is filtered and then combined by
Definition
additive mixing
Term
Blue + Red =
Definition
Magenta
Term
Blue + Green
Definition
Cyan
Term
Red + Green =
Definition
Amber
Term
Blue’s complement is
Definition
amber
Term
Red’s complement is
Definition
cyan
Term
Green’s complement is
Definition
magenta
Term
Every light has its own...
Definition
circuit and dimmer. (In OBT/Glaize, 192 dimmers. supposed to have twice that, but budget cuts)
Term
10 at 50 =
Definition
Channel 10 lights at 50% of available light.
Term
When setting a cue...
Definition
...a time is automatically set. (this board, default is set to 3 seconds [0% to the full cue in 3 seconds])
Term
how to record (desired cue number)
Definition
Enter allows one to write or rewrite (in which case you push enter twice) a cue
Term
The purpose of all design in the theatre is...
Definition
... to create an environment that visually communicates to the audience the director/choreographer’s vision
Term
McCandless general strategy for scene design
Definition
1. Read/listen in one sitting. Observe gut reactions, no notes.
2. Re-read/listen in one sitting. Take specific notes.
3. Meet with director/choreographer; find their vision
4. Meet with other designer(s). project must be cohesive
5. See a run-through. Observe choreographic patterns; see the pictures that the director has created.
6. Begin light plot.
~Divide stage into 8’ diameter lighting areas. has to be an odd number (center stage has own lights)
~Each area gets 2 lights ur most pleasing angle of illumination
~Pick warm & cool sides
~2-fer/patch by color and direction
7. Finish the light plot.
~Add side light from both directions
~Add back light.
~Light the cyc.
~Add patterns if/where appropriate.
~Add practicals (fake fire in the fireplace, chandelier)
~Add specials where appropriate
8. Sit down w/ stage manager, meet with director. Cue the script with stage manager.
9. Do cue-to-cue & re-write the cues with necessary tweaks.
Term
important parts to drafting a light plot
Definition
o The light plot must be drafted to consistent scale
o plot shows all architectural features of theatre
o plot is in ¼ inch scale; a ground plan of the space, & shows light positions and obstacles. title block shows the name of the show, space, director, designer, tech director, etc.
o If the plot doesn’t have a title block, you could hang the wrong show
o plot has footmarks measured out from centerline so we can tell where to hang the lights
o plots have a key to identify the symbols.
o After plot is done, it is up to the theatre to hang it. The light designer doesn’t come back until final focus.
Term
Another important piece of paper, in addition to the light plot, is
Definition
...the instrument schedule, which is a checklist with instrument number (assigned in the plot) position, type, circuit, colors, focus, and any special notes.
Term
No Broadway theatres own...
Definition
...lights, lighting boards, masking, equipment like twofers, or anything of that stuff
Term
All the info we need is condensed in...
Definition
...the magic sheet, which is then used to cue the show.
Term
USAA: : United Scenic Artists of America
Definition
• If one working for Broadway, one have to be member this union
• doesn't guarantee employment; guarantees certain set salaries.
• protects against producers taking unfair advantage of designers
Term
IATSE: International Alliance of Theatre and Stage Employees
Definition
• To be admitted, have to pass test (on scenery, lighting, sound both written & practical.)
• the crew that designers work with. generally do the “grunt work” for the design process.
• Standard call is 4 hours
• Because of the strength of IATSE, people get credited:
~Gaffer: gaffes down cables so people aren’t tripping
~Best Boy: in charge of trailer full of lighting equipment
~Clapper-Loader: in charge of loading cameras w/ film & of “clapper” that starts the takes of the scenes.
Term
4-Point McCandless
Definition
In non-proscenium staging, this means dividing the lighting area by four and getting our most pleasing angle of illumination ; dance lighting
Term
when we set up stage (complete with alleys with masking), we’re going to have a boom on each side for each alley. We hang three lights which are...
Definition
~one low called a shin buster (18” off the floor), one mid-level (about shoulder height), and one overhead.
---shin buster makes dancers look like they’re not touching the floor and also lights the under-planes during the extensions of the dancer’s arms and legs (more of a three-dimensional quality).
---shoulder-height lights the whole body.
---head provides light for lifts/other extensions.
---Ideally, each is in a circuit/channel by itself. If some grouping is unavoidable: shin-shin-shin, mid-mid-mid, head-head-head
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