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I like the second option better. Those E27 "bulbs" probably have light being emitted in 360 degrees, right? I'd much rather run a scrog or something and have the panels on top shooting down into the canopy. You got a link for those DIY LED panels?

Exactly my point! What if a phosphor blend can be managed so that a single LED emits everything that a plant needs and in the correct ratio? I think Blue LED's are more efficient and cheaper to manufacture, too. Idk, we just might see some of this in the future. I contacted this company asking...

Can you take the faceplate off one of the modules and snap a picture? Cree's might not be as easy a swap as other options. Then again, if you can fit LED stars under that faceplate it should be possible? Pretty hard to say, imo. I vote for keeping things the same and just doing a parts swap.

lmfao This is just a suggestion. http://www.ebay.com/itm/wdm-2pcs-Aluminum-heatsink-core-PCB-36-pcs-HP-LEDs-seres-225-193mm-/170843835766 Message Merry and tell her what you want. She has a large selection of 1W and 3W diodes. She'll solder them to the heatsink core for you in the pattern/order...

Tbph, since EH is donating drivers, it doesn't make much sense to me. But, if it still interests you, these cob's would take a different voltage and current than modules of 3W'ers I'm guessing. You could run them side by side with anything you want, but they'll in all likeliness need their own...

Hell yea, 1watters will work. Check out the "7 Plants Under Astir" thread, or whatever it is called. That's all 1W diodes. Make sure you get a good price on them, though, and try to find the largest chips you can. Do some research and then research some more. I bought 40mil Whites, 38mil Blues...

What are his prices? If he's charging more than the cost of a soldering station for labor why not build it yourself?

Looks like a fun project. Not raising my hand to perform the operation (I feel you'd want someone with more LED experience), but I'll at least suggest replacing the modules with individual multichip LED's. http://www.vanqled.com/ledgrowlight/index_xx.asp?id=634...

Even mounted to one of these? http://www.arctic.ac/en/p/cooling/cpu/365/freezer-13-pro.html Max cooling: 300W Edit - I see what you mean now. How is that possible? I have no interest in actually buying one of these (they'd burn holes through my plants, I've only got a 2'x2' grow space with...

Don't mean to derail the thread Kool, but I found this random manufacturer with a nice little chart listing a bunch of information making it very easy to compare chip size vs efficiency. Thought it might be interesting for some of us here. Same voltage, same current, same manufacturer, same CCT...

Cree has a very high lumen per Watt rating. So does the Golden Dragon Plus series of LED's. Most of the time you can check the manufacturer's spec sheet and see what their efficiency is. Remember, though, lumens aren't the whole story. Spectral distribution is very important and plays just as...

Saw this and thought I'd share: http://www.vanqled.com/ledgrowlight/index_xx.asp?id=605 They even do custom spectrum. :-P

No prob. Make sure it's 300W at the plug. Many of these companies multiply the number of LED's that they use by the maximum wattage of those LED's and say that their panel is that many Watts. That almost always isn't the case and if it is the lifetimes of the diodes are being compromised.

40 Watts per square foot. 2.6ft x 2.6ft = 6.76ft^2 6.67ft^2 x (40W/ft^2) = 270W 270W is a good goal, imo.

Looks good to me! Supplement with a couple CFL's to round out the spectrum, imo, but that should rock a single plant. Hope your grow goes well.

Never heard of them. Good to know. Just looking at the lumen/Watt rating of the same wavelength. Those are actually the guys I'm in contact with. They quoted me at 42mil Red, 45mil Blue as their TOL, high lumen output version. They have a 32mil Red and 35mil Blue version for a little over half...

Nah, no sweat. I didn't know about chip size 'til recently. Well, to my knowledge they don't make 45mil Red's. So if you have a combo of Red and Blue hopefully you've got 42mil and 45mil chips. Also, I've contact that eBay seller and asked whether or not they do customer specified ratios and...

Nah, I know it's 50W, but the individual chips that they use could potentially be 32mil (Red), 35mil (Blue), 42mil (Red), 45mil(Blue) and the larger chips sizes are more efficient. Same wattage, more light, less heat. This is why I think it's important to know the chip size. I'll pay a little...

Lawl, you could probably put a remote phosphor lens over those 10,000k Whites (and the rest of the chips, but just saying) to shift the spectrum even more. Wonder what the chip size is...

No. General consensus: 40W/ft^2 You're grow space: 2ft x 2ft = 4ft^2 4ft^2 (40W/ft^2) = 160W 10W could flower a single plant that's maybe 10" tall with an expected yield of maybe a half-oz. You're probably looking at a grow space the size of a PC case.