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 ?
Although people can discriminate objects and colors under both types of lamps when light levels are abundant, metal halide offers more accurate vision at low light levels, especially below three foot-candles.
Department of Agriculture (4) (USDA), every room where utensils for dairy products are produced, packaged or washed must have at least 30 foot-candles of light intensity on all work surfaces.
That's measured in foot-candles (based on English units) or, more commonly these days, the metric unit lux.
The new court lighting package delivers light levels of more than 16 foot-candles across the full playing area, while achieving extremely even light levels, a max/min ratio of only 2.
Light is measured in foot-candles -- the amount of light cast on a square foot area by a candle at 1 foot distance -- and the sun on a clear summer day can bathe us in 10,000 foot-candles.
Touch the screen to define the boundaries of the actual area to be illuminated and virtually set up and aim the portable light towers to determine the placement and quantity of the towers, as well as the light configuration that most efficiently lights the worksite to the desired level of illumination, which is measured in foot-candles.
When I converted foot-candles to lux, I noticed how
Rechargeable batteries power XV1 for a full day's work, delivering up to 4,000 foot-candles of light.
2] and the white light output can be regulated to fall between 1,000 and 2,000 foot-candles (93 to 186 lux).
2], and the white light output can be adjusted from 2,000 to 1,000 foot-candles (186 to 93 lux).
For example in Normal Mode, 170,000 LUX or 17,000 foot-candles of light is available, while in Turbo Mode, illumination can be increased to 220,000 LUX or 22,000 foot-candles.
The lamp's visible light emission is less than two foot-candles, and it easily meets MIL and ASTM specs for FPI and MPI.