The three most common varieties of artificial lighting for indoor growing are high-intensity discharge lamps (the most prevalent for this application being: sodium-vapor lamps for flowering and metal halide lamps for growing), compact fluorescent lamps, and traditional fluorescent lamps.
Indoor plant cultivation often utilizes high-intensity discharge lamps, particularly sodium-vapor and metal halide lamps, as the primary artificial lighting options. Compact fluorescent lamps and traditional fluorescent lamps are also commonly used for indoor plant growth.