foot-candle

[/ˈfʊt ˌkændəl/]
nounpl: foot-candles
lux (unidade de iluminação)
1. A unit of illumination equal to the amount of light produced by one standard candle at a distance of one foot, now largely replaced by the lux in the metric system
The photographer adjusted the lighting to achieve 500 foot-candles for the portrait session.
O fotógrafo ajustou a iluminação para atingir 500 lux na sessão de retrato.
2. A measure of light intensity used in photography, cinematography, and lighting design
Professional studios typically maintain 200-300 foot-candles for optimal video recording.
Estúdios profissionais geralmente mantêm 200-300 lux para gravação de vídeo ideal.
The foot-candle is a legacy unit of measurement from the imperial system. While it remains in use in some American industries such as cinematography and older architectural lighting standards, it has been officially replaced by the lux (equivalent to approximately 10.764 foot-candles) in most international contexts and modern technical standards. Brazilian and European professionals typically use lux exclusively in contemporary practice.
Synonyms / Sinônimos
luxfoot-lambertcandlepowerillumination unit

Regional Variations

General Brazilian
lux
The metric term 'lux' is now standard in Brazil for measuring illumination; foot-candle is considered obsolete
United States
foot-candle
Still used in some American industries, particularly in older technical documentation and legacy lighting design specifications
Portugal
lux
Portugal uses the metric system exclusively; foot-candle is not commonly used

Related Words

lumencandelailluminationlight intensitylumens per square footphotometry
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