What are the mechanical flaps on the sides of lighting instruments that shape the beam called?

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Multiple Choice

What are the mechanical flaps on the sides of lighting instruments that shape the beam called?

Explanation:
Barn doors are the mechanical flaps that attach to the front of a lighting instrument to shape the beam. By opening, closing, or adjusting these hinged panels, you can block parts of the light, control spill, and create a defined edge or specific shape. They’re not used for coloring light (that would be gels), nor are they the light source (LED lamp) or a type of fixture (Fresnel lights). Gels filter color, LED lamp refers to the light source, and Fresnel lights describe a lens-based fixture with a soft beam; barn doors are the adjustable shielding used for beam shaping.

Barn doors are the mechanical flaps that attach to the front of a lighting instrument to shape the beam. By opening, closing, or adjusting these hinged panels, you can block parts of the light, control spill, and create a defined edge or specific shape. They’re not used for coloring light (that would be gels), nor are they the light source (LED lamp) or a type of fixture (Fresnel lights). Gels filter color, LED lamp refers to the light source, and Fresnel lights describe a lens-based fixture with a soft beam; barn doors are the adjustable shielding used for beam shaping.

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