foot-candle

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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 the clinical laboratory is emission photometry and ion-specific potentiometer electrodes (Henry, 1991).
Two other commonly discussed alternatives to photopic photometry that lead to higher relative efficacy of our blue stimuli relative to our red stimuli are the Judd correction for wavelengths shorter than 460 nm and the Y-bar function for the 10-degree observer [CIE 1978].
Further, I obtained access to the photometry of all of the stars observed by Hipparcos [2].
Rennie said: "The botanical photometry system is used in the orange production industry in Florida to pick up on the early warning signs of stressed trees.
Poor Tara Fitzgerald, who plays the white-coated Dr Eve Lockhart, gets the worst of it, with "a microspectra photometry and chromatography test" all in one sentence.
Topics covered include light and color, vision and perception, fixtures and photometry and LEED Design and economics.
A run time self-tuning function increases reading performance with a built-in photometry calculation.
Stromgren's scientific contributions can be separated into three main topics: problems of chemical composition of stellar structure and stellar interiors (1930-1940), the physics of interstellar gas (1938-1953), and photoelectric photometry of stellar spectra (from 1948).
Moreover, with advancements in computer software programming, manufacturers began to utilize improved photometry to design field layouts that accurately predicted light levels.
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.