foot-candle


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foot-can·dle

(fo͝ot′kăn′dl)
n. Abbr. fc or ft-c
A unit of measure of the intensity of light falling on a surface, equal to one lumen per square foot and originally defined with reference to a standardized candle burning at one foot from a given surface.

foot-candle

n
(Units) a former unit of illumination, equal to one lumen per square foot or 10.764 lux

foot′-can`dle



n.
a unit equivalent to the illumination produced by a source of one candle at a distance of one foot and equal to one lumen incident per square foot.
[1905–10]
References in periodicals archive ?
This includes the latest set of regulations issued by the International Code Council (ICC), which clearly details the need to light the treads and landings of interior stairways to “levels not less than 1 foot-candle (11 lux)” and install lighting in “the immediate vicinity of the top landing of exterior stairs.
Measurements were made in foot-candles, to a 10th of a foot-candle.
The measurement they used in their research was the foot-candle, or the amount of light put out by one candle, one foot away.
We recently conducted a research project in which the dining room provided only five foot-candles of light at the table, which is well below the 50 foot-candle recommendation.
Before LED lighting fixtures were installed, the foot-candle reading averaged 40 fc.
Engineered for applications with high vertical foot-candle requirements, it provides peak optical performance, maximum fixture efficacy, lower total cost of ownership and improved overall illumination without creating hot spots on higher shelves.
The article "Relighting a Hangar"--one of the aeronautic theme stories in this issue--described how the Minnesota Air National Guard's maintenance hangar transitioned from a 5-10 foot-candle mercury and incandescent system to a 1,000-W high-pressure sodium layout offering 100-plus fc using the same grid spacing.
People also had trouble with colors viewed under light from high-pressure sodium lamps at light levels below one foot-candle.
After examining numerous LED products I determined that Seesmart was the one I'd want installed in my buildings as there bulbs provide higher foot-candle readings at lower wattages compared to the competitors.
A foot-candle is equivalent to the illumination produced per square foot by one candle at a distance of one foot.
In addition to eliminating noise from the fixtures throughout the facility, the Albeo lighting fixtures also have a rated lifetime of 100,000 hours and provide greater foot-candle performance, helping to increase light levels while further reducing energy use and maintenance burdens on the facility.
Standard Electric supplies all of Timberland's in-store lighting, including the new LED lamps which are more than twice as efficient as the comparative foot-candle incandescent bulbs being replaced.