I'm running a set of HTG 600 digitals & I love them!awesome.. good to know.. with my growspace, i think im only going to push a 600 watter with maybe some auxiliary cfls.. im still just torn between an hps only ballast or one that can do both.. i really wanna experiment with metal halide for veg as well as flowering with HPS.. was looking into the htgsupply 600w lights.. they are so frickin cheap, they sound too good to be true.. 120.00 for 600w hps?!?