Luminous intensity is a measure of how much light is emitted by a source in a particular direction. It is quantified in units called candelas, which represent the amount of light produced by a standard candle. This measurement helps in understanding how bright a light source appears from a specific angle. Luminous intensity is important in various fields, including lighting design and photometry. It allows engineers and designers to create effective lighting solutions by determining how light will distribute in a space. By knowing the luminous intensity, one can ensure adequate illumination for safety and comfort.