High-pressure sodium (HPS) lights are also known as high-intensity discharge lights. It operates at high internal pressure as compared to other lighting. Instead of having “blue” lights emitted, it has a color of a mixture of “yellow” and “red” to bring out the warm, golden sunlight color spectrum.
High pressure sodium (HPS) lights are suitable for indoor gardening / planting as the lighting will give the essence to stimulate the plants. Furthermore, HPS lighting has high energy efficiency in proportion to the electricity used in any other glow lights.