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 ?
This data uses candlepower, reflector type and fixture type, at the light source to project the number of footcandles of illumination at a target.
In the study, bright lights averaged 60 footcandles and the dimmer lights 25 footcandles.
For the open offices, 25 footcandles (fc) [269 lux] and a 4:1 maximum-to-minimum illuminance ratio were selected as the ambient workplane illuminance and uniformity criteria.
Company's 49 or 89 Enviroguard tube with Vision+ optics increases footcandles 57%.
Most interior plants require a minimum of 80 footcandles to 150 footcandles to thrive and grow.
Most areas of concern, except compliance with the National Fire Protection Association (NFPA) Life Safety Code, call for general illumination above 10 footcandles.
Under fluorescent lighting, the Mall achieved around 12 footcandles at 30 inches above the floor.
To make the mannequins in the window pop, the team used LED track heads with 350 footcandles of illumination.
These values are minimum average maintained footcandles.
The specially engineered reflectors also minimize glare and deliver a substantially higher percentage of usable footcandles on key work areas than traditional HID and fluorescent fixtures.
0 footcandles, requiring four poles in the main yard, each holding four Venture 400-watt pulse start lamps.
3) Generally, a lighting system with deep-cell parabolic louvers will provide about 50 footcandles of light if installed in an 8[inches] by 10[inches] office.