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glossary
 
A-BC-DE-FG-KL-NO-ST-Z



L

Lamp
The complete assembly of a bulb, filament, base, etc.

Lamp Bar
A pipe, usually aluminum, that has a fixtures attached at even intervals.

Leko
A commonly used term for an ellipsoidal spotlight. Named after its inventors Levy and Kook. The names Leko and Lekolite are trademarked by Strand Lighting Co.

Lens
A transparent material, usually glass, shaped to bend light rays as they pass through it.

Lift
A height adjustable stand or tower.

Light Adaptation
The process of the eye adapting to changes from dark to light.

Lighting Bridge
A narrow platform mounted above the performing area used for mounting luminaire's, often incorporated into a truss rig or into the grid in a theatre.

Light Plot
The diagrammatical layout of luminaire's and related equipment.

Limbo
A background having no detectable detail.

Line Voltage
A term that usually means 120 AC volts.

Load
The lamp or lighting instruments placed on a circuit.

Lumen
A unit of (light) flux. 1 Lumen/ft2 = 1 fc

Luminaire
A complete unit for the purpose of generating usable and somewhat controllable light.

Lux
A metric unit of measurement for illumination. 1 Lumen/m2 (10 lux = 1 ftc)

M

Magnetic Ballast
A ballast that uses a magnetic filed to limit electrical current.

Mask
To hide from view. To cut off part of a beam of light.

Matrix
A patching apparatus that can be a patch panel or diode pin matrix.

Memory Board
A contral console that has computerized functions and an ability to electronically store data.

Mini Strip
A compact striplight that uses 1 to 4 groups of ten 12 volt lamps wired in a series circuit.

Model
To use light and shadow to entrance three-dimensionality.

Multiconductor Cable
An electrical cable that generally has more than three conductors.

N

Near Cyc
A cyclorama light placed close to the cyclorama, generally less than 8'.

Neutral Conductor
A current carrying conductor that is electrically connected to neutral.

Non-Dim
A circuit supplying electrical power to a luminaire by means of a switch or a relay in order to permit an on-off function rather than a dimming function.

NSP
A lamp designation that means "narrow spot".


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