Technical excerpt outlining lighting criteria and fixture zoning requirements for audiovisual rooms in the Mayor's Office.
NYC-WTC_000174020–000174021Folder label: “Lighting Criterial for Audiovisual Rooms®Architect's Summary of Audiovisual BaseBuilding Requirements”
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NYC 9/11 Public Portal Document
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will enhance video image quality.
Distance learning or other applications where a presenter must he illuminated: At a minimum, a key light and a back light should be provided to illuminate the lectern position. A key light provides the main sources of illumination and is typically a fresnel spotlight placed at a 45° angle to the subject and at a 45° angle above the plane of the camera. “Barndoors" are also recommended to further conh ol the light beam shape. A back light is normally located 45° to 60°above the camera; plane behind the subject. Illuminating from the back in this manner separates the subject from the background and provides depth to the video image.
Key light: 70fc - measured vertically at the face of a subject at the lectern Back light: 35fc
'Phe positioning of these fixtures is critical so that the subject is prctperly illuminated while avoiding light spill onto the projection screens and back towards the camera lens. This concerns light spill from both direct light sources as well as light reflected off inirrounding surfaces. For example, care must be taken so that light is not reflected off ihe lectern and on to the screen (see finish recommendations elsewhere in this report).
The guidelines above are only baseline criteria based on the audiovisual functionality of the room. Lighting fixture types, quantities, exact locations and zoning shall be as specified by the Architect/Lighting Consultant/Electrical Engineer.
The specifications shall be coordinated with Shen Milsom & Wilke, Inc.
MAYOR’S OFFICE OF EMERGENCY MANAGEMENT SMW #5149 Architect's Summary of Audiovisual Basebuilding Requirements January 13, 1998 Page-14 -
NYC-WTC_000174021
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