Ha I've already crossed to the dark side, I run 200w of COBs in a small tent, mainly used for breeding but I flower in there the odd time. I have another 300w of 3070's I haven't put together. No need to sell me on COBs, I'm just a little skeptical on the 3590's being that much better, gotta see it. I run 50/50 soil/pro-mix and feed every other watering. Those pull 345w at 240v and 365w at 120v, they're not record breakers, but for anything other than COBs they're a nice option. They (2x315's) only brought my temps up 4-5F overall when I switched them out for same wattage in LED's, all I use is 4" exhaust and intake, mostly running at the lowest setting other than in mid-summer. These are not hps, nor typical MH bulbs.