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Running the veros29 @1.05A will make them 44.75% efficient. Each will give off 37.7 DisspW, 16.87 of which will be PARW. I'll have to run each bar with a 150W driver. Any suggestions for a driver compatible with the Vero29s? This will decrease the whole COB consumption from ~1.6KW to ~1.2KW...

CXA 3070 cost 28.5$ not the CXBs

According to the pdf in the cree web site roughly should be between ~34.5V and ~35.7V depending on the temperature. A supplier in alibaba. the company's name is Hangzhou Kulon Electronics Co.,Ltd.

Same calculations for the CXB3070 AB @ $28.5 (IF) 4xCXB3070 AB x 8 bars 10 x HLG-185H-C1400B x 43.90 euro = 439 + 45.07 shipping 40 x CXB3070 AB x 25.68 euro = 1027.20 + 112.67 shipping 1623.94 4xCXB3070 AB x 49.83 Dissp.W@1.4A@45.43% = 22.64 PARW x 4 = 90.55 PARW If...

I'll ask him again, because if you are right I'll get the CXB3070s. It is way better! Otherwise I'll go with the Veros and just Blow them harder ;)

That's what he told me, if we are talking about the same Jerry.

My info is from Jerry, from today.

Sounds good, but I don't think you have the price right. I can't find it anywhere that low, the lowest I find it is $36.5.

Yes I am. I cannot afford the most expensive stuff, well for now anyway. Electrical bills are gonna be lower with the COBs, not significantly but at least... Where I live is hot all year round. I cannot deal with heat that well without spending a lot on ventilation. Don't HPS have this as a...

Chine most likely, but yeah it can be ordered from the EU. ;)

Thanks man, I figured that one out myself. ;) After a lot of questions, A LOT, thinking over designs, number of chips, number of drivers, heatsinks, fans etc. I had the time to contact a few suppliers get the prices for everything that I might need, which was again a lot of asking. When I...

I am confused again. Hm..... 3 chips from 36V version would be able to run with these watt at this current. Yes? But the drivers' output voltage i higher than 36V, so they won't be able to run 3 Chips at all. Is that right?

Aren't all types/brands of chips capable of emitting light similar to day light (5600K). Isn't the "cheap" COB from the video just with different color temperature from the Yuji one?

I now it may be a stupid question... but Can I run 3x CXB3590 CD 72v@1.4A with this: http://eu.mouser.com/ProductDetail/Mean-Well/LPC-150-1400/?qs=sGAEpiMZZMt5PRBMPTWcaY9Bjg3OKYMlXsqyl0pq4CE5tUcv4JDCpA== or this...

Why bother with different spectrum when you only have to change the temp.... sarcastically!

Man, that a lot of juice! How many plants do you have under the fixture? How tall are they? I am aiming for higher efficiency and lower Dissp.W. According to what I've come up with as numbers even if I am running at 50% at 40 Dissp.W per COB, I still get 20 PAR W per COB which is 480 PAR W all...

I was thinking about the coverage, COBs per driver, number of chips etc. I came up with something which holds 6 COBS driven by either one 240W driver or two 120W ones for a space of 2x4ft. I know it´s maybe too much but the 3D models help me imagine better what I want, so here it is. Edit...

I don't know how I missed this thread. It's awsome! ;))

As you remember my original plan was to build 8 bars each having 4 COBs which in this (196W Diss @ 56%) case would mean 49 Dissp. W/sq ft @ 56% = 27.4 PAR W / sqft. From what I have read this is more than enough. Given the fact that I am planning a SOG grow (128 plants in the 8x4 ft), and the...

Great! That was my plan to, before the Chinese grow light fiasco. Then when time comes Kingbrite are the people! good that I have already made contact with one guy from their alibaba team. ;)