Grow Light HPS Digital Ballast 1) Input Voltage ... 99 4) 600W 2012 New Popular Type: Grow Light 600W HPS Digital Ballast Hold ROHS, CE, TUV ... Trouble-detecting protection function3) Dimming, adjustable output power4) Light weight, small size, non-flickering, noiseless5) Fast ... light weight, low operating temperature, rapid install and excellent energy saving. 2012 New Popular Type: Grow Light 600W HPS ...