(redirected from Foot-candles)
Also found in: Dictionary, Thesaurus, Medical, Financial.


see photometryphotometry
, branch of physics dealing with the measurement of the intensity of a source of light, such as an electric lamp, and with the intensity of light such a source may cast on a surface area.
..... Click the link for more information.


A unit of measurement for the average light on a surface; 1 foot-candle equals 1 lumen per square foot.
References in periodicals archive ?
You can translate those needed foot-candles into light measured by a digital SLR camera.
By changing that, we were able to get the foot-candles up to 25.
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.
The existing lamps provided only 25 foot-candles on the floor.
25 foot-candles, 10 of the 12 cadets identified the handgun correctly, but 2 cadets still incorrectly identified it or stated they could not identify the object.
The new lighting system, Menders said, will be able to perform at three different levels - 100 foot-candles for television, 60 foot-candles for night track meets and 30 foot-candles for practice.
We put the lighting where it is needed and weren't so concerned about flooding every square inch of the store with a continuous 80 foot-candles.
Gone is the hospital-style emphasis on the head wall and--depending on state regulations--the linear fluorescent light behind the bed, replaced by a minimum of 20 foot-candles of ambient light throughout the room.
The Illuminating Engineering Society of North America recommends a minimum illumination of 30 foot-candles for areas of general ambulation in long term care facilities.
The white light output, when used with the CERMAX300 lightsource, is 9,290 foot-candles, or 100,000 lux of high-intensity, brilliant, and uniform illumination for all applications.
In general, the study found that sites with lighting levels below three foot-candles were given low security ratings, usually between -4 and 1.