Thank you for this. I've spent the past couple of days researching and I'm pretty impressed with the Area51 w90. At the moment 3 of those are my top choice for a 3x3 seed to harvest. I've also considered building my own rig since I used to build computers years ago, and I'm thinking of trying the New CREE Lumina 5.2 65W Grow LED http://www.ledgroupbuy.com/cree-lumia-5-2-65w-grow-led-5-channel-for-plants/Pure insanity to pay more than $250 for it!
Check out
pacific light works
GOGREENLEDS they're a sponsor
HB. They're a sponsor
Area 51 w90
I think 3 or 4 of these mounted to a square heat-sink should give adequate coverage for a 3x3.