Types of light used in Theatres

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"The Fresnel"

A Fresnel is a common lantern used in theatre, which employs a Fresnel lens to wash light over an area of the stage. The lens produces a wider, soft-edged beam of light, which is commonly used for backlight and top light.
A lightweight short throw, all-purpose lighting device the 6° Fresnel produces a soft-edged beam that varies in diameter from  4.2 feet to 21 feet at a throw distance of 15 feet for the 65Q. The 65Q is designed for operation with a long-life, high-intensity tungsten halogen lamp.


                  

"Par Cans"

A parabolic aluminized reflector lamp (also PAR CAN light, PARcan, or simply PAR).
The par 64 is a low-cost versatile Lumiere designed for diverse applications. Intensities and beam spreads are a function of the lamp selected for use in the fixture. The par has an oval-shaped beam and is usually lamed at 1000 watts.


"The Ellipsoidal"

Ellipsoidal reflector light (abbreviated to ERS, ellipsoidal, or ellipse) is the name for a type of stage lighting instrument, named for the ellipsoidal reflector used to collect and direct the light through a barrel that contains a lens or lens train. The optics of an ERS instrument are roughly similar to those of a 35 mm slide projector. ERS may also be referred to as Profile Spotlights (especially in Europe) because the beam can be shaped to the profile of an object. Most manufacturers now use field angle to indicate the fixture's spread typically in this series (5°, 10°, 19°, 26°, 36°, 50°, 75°, 90°). It has an ellipsoidal reflector behind the lamp to reflect the light in the direction required. They have brackets on the end to attach gels and barn doors. Barn doors do the same as the shutters but give a softer edge.



Other lights are also used example: UV black lights, strip lights, follow spots, and soft lights. etc



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