What is the term for the brightest part of the beam, with controls to eliminate hot spots?

What is the term for the brightest part of the beam, with controls to eliminate hot spots?

• A. Compact Source Iodide (CSI)
• B. Hot Spot
• C. Freie Buhne
• D. David Belasco

Answer: (B)

The brightest part of a light beam is called the hotspot. In theatrical lighting, when a fixture is focused to a narrow beam, the center appears much brighter than the edges. Designers work to eliminate this hotspot so the light field onstage reads evenly; this is done by diffusing and shaping the beam, or by blending light from multiple sources. Diffusion materials (like frosts or diffusion gels), soft-edged fixtures, or additional fixtures placed to blend the light can all reduce or remove the hotspot. The other options aren’t lighting terms for this concept—they’re unrelated names or references.

The brightest part of a light beam is called the hotspot. In theatrical lighting, when a fixture is focused to a narrow beam, the center appears much brighter than the edges. Designers work to eliminate this hotspot so the light field onstage reads evenly; this is done by diffusing and shaping the beam, or by blending light from multiple sources. Diffusion materials (like frosts or diffusion gels), soft-edged fixtures, or additional fixtures placed to blend the light can all reduce or remove the hotspot. The other options aren’t lighting terms for this concept—they’re unrelated names or references.