Engineered by experts in Lamp-Ballast compatibility to optimize Eye Hortilux® lamps. Years of research & development has resulted in a product that actually works and consistently operates Metal Halide & High Pressure Sodium lamps. Clean Cool technology channels airflow to reduce dirt & dust accumulation on critical electronic components. 120 hertz, low frequency square wave form. Flicker-free steady state operation. Superior performing design – made in Japan. 120/240 dual voltage capability. Pre-wired with Sun System® receptacle. Includes 120 volt power cord. Generator ready. Extended ground contact in lamp plug for maximum safety.