foot-candle

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Related to photometry: colorimetry, spectrophotometry, flame photometry

foot-candle

A measure of light intensity. One foot-candle is the illumination measured on a surface one foot from the source of one candle. Many worker-safety regulations specify the minimum foot-candles of light required in work areas.Zoning variances for commercial properties near residential areas might place a restriction on the maximum foot-candles of lighting after a certain hour at night.

References in periodicals archive ?
In Figure 2 we plot expanded views of the longer time series photometry runs, where each panel shows one day's data drawn to the same scale.
Iriarte B, Johnson HL, Mitchell RI, Wisniewski WK: Five-Color Photometry of Bright Stars, Sky and Telescope 30 (July): 21-31, 1965.
Near field photometry measurements and application for fluorescent luminaires.
Further, I obtained access to the photometry of all of the stars observed by Hipparcos [2].
The X-STREAM analyzers offer single- and dual-channel analysis utilizing infrared, ultraviolet and visible photometry, paramagnetic and electrochemical oxygen, and thermal conductivity sensor technologies.
Three of these, gravimetry, fluorometry, and photometry have been used for at least two decades, while ratiometric photometry[TM] is a newer, but still proven technique that combines the advantages of fluorometry and photometry.
Flame emission photometry relies on the principle that certain atoms, when energized by heat, become excited and emit a light of characteristic wavelength.
We observed using the technique of differential photometry in the Stromgren system.
Research efforts will primarily focus on different types of photometry due to the low-altitude location of the observatory.
It may not be applicable is the focal planes of fast lenses or in the case of large apertures used in radiometry and photometry, especially in the infrared and microwave regions.