So back to the cxb 3590... I had to do some double checking on prices to attempt to be accurate. After visiting rapidled.com, let's go through a build for a 2'x2' room. We'll target 50 watts sq/ft using about the most common cob build in use today. Also, I used rapid because they are typically competitive, have free shipping over $200 (I think) and their website is easy to use. Arrow, digikey, and others maybe a bit cheaper.
So 50 watts x 4 sq. ft. will make our target 200 watts. We determined 1400ma was a good balance of operating current, I prefer to keep voltage as low as possible while maintaining even coverage and reasonable cost (safety) so we'll opt for the 36 volt version of the cxb.
36 volts x 1.4 amps (1400ma) = 50.4 watts. Convenient isn't it! So 4 cobs will get us 200 watts, and spacing 12 in on center will be great even canopy coverage. Let's buy parts!
4 x cxb 3590 with solderless holder = $162
4 x 140mm passive pin heatsinks = $76
1x hlg-185-1400 = $50
1 x 8' 1x1x 1/8 aluminium angle $20ish
Misc nuts, bolts, wire, connectors $25
Thermal transfer paste, pad, tape $5
I think we're looking at about $340. You crafty pack rats that save everything, we'll say you're all in for $300.
We're talking $300+ for a 2x2, does anyone actually like that? Sounds fugly to me, you can kick butt with 2 Mars 300 for half that right?
You are absolutely correct! The gain will be in the light intensity. You can still scrog, top, and train. But it will be by choice, not so you can yeild. Assuming if you're here, you've seen growmau5 and greengene videos. Those guys are yielding 1.5 to 2 grams per watt on half the veg time doing very little to nothing to their plants. Granted they are experienced which will always be a factor.
Are we happy with this, or do we want other options?