noun
: the candle power of an extended source of light that is equal to the candle power of a point source of light which if located at the extended source would produce an equivalent illumination at the distance specified
noun
: the candle power of an extended source of light that is equal to the candle power of a point source of light which if located at the extended source would produce an equivalent illumination at the distance specified
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012