LEDwholesalers GYO2004B 600 Watt Hydroponic Grow Light Ballast Hydroponic grow light ballast Rated voltage 120v /input current 5.30 ampere Frequency 50 hertz/60 hertz/ power factor &gt; 0.99; harmonic distortion &lt; 10 percent crest factor &lt; 1.7 Total luminous flux &gt; 75, 000 lumens Frequency (hertz) 25 kilohertz - 100 kilohertz/loss of input watts &lt; 10 percent