Foot-candle

A foot-candle is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States.

Nearly all of the world uses the corresponding SI derived unit lux, defined as one lumen per square meter.

Back to Photometry & Units →

Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

LUMINOSIT

The science of light, made practical — photometry in plain English, plus the lumen, lux, candela, and energy calculators every lighting decision needs.

Get new guides by emailOccasional emails. No spam. Unsubscribe anytime.

InformationAbout Contact Privacy Policy Terms of Service Disclaimer Affiliate Disclosure Cookie Policy

Every species, image, fact, and figure is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.