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"abstract": "A PAPER dealing with relative visual and photographic efficiencies of illuminants1 was published from this laboratory some years ago. This was followed by a communication in which the use of artificial light in the motion picture studio was discussed.2 Since that time considerable progress has been made in the production of artificial light and many new and improved light sources have become available for use in the studio. During the past two or three years great improvement has been made in the photographic materials applicable to motion picture work, both with respect to the total or white light speed and from the standpoint of the sensitivity of all to the wave-lengths of radiation within the visible spectrum. The data relative to the photographic characteristics of illuminants published in the communications mentioned above covered the field very satisfactorily at the time, but in order to bring this information up to date, it now seems desirable to publish further information applying particularly to the more modern light sources and photographic materials. That these values may be of immediate practical use the measurements have been made by a very direct experimental method. It seems desirable, however, before taking up the discussion of this method and the results, to consider briefly some of the theoretical relationships involved in the determination of the photographic characteristics of a light source. For a more complete treatment of this phase of the subject reference should be made to the previous publications.",
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"authors": [
"Loyd A. Jones",
"M. E. Russell"
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"holder": "Society of Motion Picture and Television Engineers, Inc.",
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"year": "1928",
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"docTitle": "Photographic Characteristics of Motion Picture Studio Light Sources",
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"doi": "10.5594/J10238",
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"pages": "427–452",
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"country": "USA",
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"volume": "12",
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