Evaluation and Control of Brightness Levels for Television Studio Lighting

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: One of the best known units of measurement in the practice of applied lighting is the foot-candle. It is used to measure incident lighting density and corresponds to a uniformly distributed light flux of one lumen per square foot. However, we are usually concerned with incident light only as a means of obtaining surface reflections and the foot-Lambert then becomes an important unit of measurement, since it represents the apparent foot-candle, or the value of incident light in foot-candles multiplied by the reflectance factor of the diffusely reflecting surface. It is shown that knowledge of foot-candle data alone does not necessarily lead to an accurate calculation of foot-Lambert values where colored surfaces are concerned. Color is discussed from the standpoint of spectral distribution in the illuminant and its effect upon brightness reflectance of colored surfaces. It is also shown that apparent brightness values as seen by the eye do not correspond to the actual values.
Publication Date: 1960-07-01
DOI: 10.5594/J15587
Link: https://doi.org/10.5594/J15587
Author(s): Rollo Gillespie Williams

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Rollo Gillespie Williams; Evaluation and Control of Brightness Levels for Television Studio Lighting, Journal of the SMPTE ( Volume: 69, Issue: 7, July 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J15587

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Rollo Gillespie Williams; Evaluation and Control of Brightness Levels for Television Studio Lighting, Journal of the SMPTE ( Volume: 69, Issue: 7, July 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J15587

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<span class="citation">Rollo Gillespie Williams; <cite>Evaluation and Control of Brightness Levels for Television Studio Lighting</cite>, Journal of the SMPTE ( Volume: 69, Issue: 7, July 1960); SMPTE, 1960. Available at <a href="https://doi.org/10.5594/J15587" target="_blank" rel="noopener">https://doi.org/10.5594/J15587</a></span>

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Rollo Gillespie Williams; Evaluation and Control of Brightness Levels for Television Studio Lighting, Journal of the SMPTE ( Volume: 69, Issue: 7, July 1960); SMPTE, 1960
doi: 10.5594/J15587
url: https://doi.org/10.5594/J15587

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<li>
Rollo Gillespie Williams; <cite id="bib-10-5594-j15587">Evaluation and Control of Brightness Levels for Television Studio Lighting</cite>, Journal of the SMPTE ( Volume: 69, Issue: 7, July 1960); SMPTE, 1960
<span class="doi">10.5594/J15587</span>
</li>