Foot-candle is a commonly used term to describe light in terms of its quantity or intensity. However, there are a few alternative terms that can be used to describe it, such as lux, lumen, or candlepower. Lux measures the amount of light in a given area, while lumen measures the total amount of light emitted by a light source. Candlepower refers to the intensity of a light source as seen from a given distance. Although foot-candle is still the most widely used term for measuring light intensity in the US, the use of alternative terms such as lux and lumen is increasing as they are more commonly used globally.