from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle
Sorry, no etymologies found.
The norm for illumination was a footcandle or less just a few years ago, Gibbs says.
Three quarters to one footcandle, Gibbs estimated.
The St. Paul building code lists thousands of do's and don'ts in breathtaking detail - stipulating, for example, that every basement window must have a screen of "not more than sixteen (16) mesh per inch" and that outdoor lighting be equal to "one (1) footcandle at the pavement."
Lutron Ecosystem electronic dimming ballast tuned to desired footcandle and energy levels.
It can also focus down to 1/8 footcandle unassisted by its AF-assist lamp when trained on a high-contrast subject, and can focus in total darkness with the AF-assist lamp enabled.
Before and after photos of the lighting on Davie Street: BEFORE (HPS) AFTER (LED) Technical findings: • 51% footcandle reduction measured at selected points on the street with LED lighting • 8% footcandle reduction measured at selected points on the sidewalks with LED lighting • 43% footcandle reduction as calculated on the entire street with LED lighting • 42% wattage reduction with LED lighting • Uniformity