Candle power, also known as luminous intensity, is a term used to measure the brightness of a light source. However, there are several synonyms that can be used in place of candle power. Luminance, radiance, and brightness all describe the intensity of light emitted by a source. Lux is another synonym that measures the amount of light that falls on a surface per unit of area. Foot-candle is also commonly used as a synonym for candle power, which measures the amount of light that falls on a surface one foot away from the source. Whether you prefer to use candle power or one of its synonyms, each term is useful in describing the intensity of lights in different settings.