High-pressure sodium (HPS) lamps are a type of gas discharge lamp that produces light by passing an electric current through a mixture of sodium and other gases. They are known for their bright yellow-orange light and high efficiency, making them popular for street lighting and industrial applications. HPS lamps have a long lifespan, often lasting up to 24,000 hours. These lamps operate at high pressure, which allows them to generate more light with less energy compared to traditional incandescent bulbs. However, their color rendering is limited, making them less suitable for applications where true color representation is important, such as in retail or art galleries.