testiclees
Well-Known Member
i spoke w jerry yesterday. i asked for 3590cd 72v 3500k.
He tried to sell me a different bin. I declined. I will message him again if you have successfully ordered that particular cob.
let me know. many thanks
I haven't yet. I talked with the suppliers he says they are out of them, but they'll have a new shipment on the 17th of july, or something like that. I still have time until my project starts. For now I'm just gathering info on the parts I'll need. I hope what I found helps.i spoke w jerry yesterday. i asked for 3590cd 72v 3500k.
He tried to sell me a different bin. I declined. I will message him again if you have successfully ordered that particular cob.
let me know. many thanks
I haven't yet. I talked with the suppliers he says they are out of them, but they'll have a new shipment on the 17th of july, or something like that. I still have time until my project starts. For now I'm just gathering info on the parts I'll need. I hope what I found helps.
It'll be very nice if we can get some pictures of your build.ya sounds good. im just getting my parts together as well.
i grabbed my drivers from ali. im runnen 4 cobs @.700ma.
I have a huge recycled heatsink so i am good w passive cooling.
Super simple pontoons (2) each holding 1 driver 2 3590s, passively cooled with an optic vero 360 in the middle.
I havent made any progress since this post https://www.rollitup.org/t/heatsinks-for-diy-led-lamps.851907/page-45#p.It'll be very nice if we can get some pictures of your build.
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 plant are going to be as short as possible I believe that I would get by beautifully with 15 PAR W/sqft which at that efficiency translate roughly into 30 Dissp.W/sqft. (always rounding up) which is 960 Dissp.W for the whole space.Unless you are planning on using separate drivers, they would probably be easiest in bunches of 4 because 4 fit on the HLG-185H-C1400. So that would give you 196W Diss @ 56% = 110 PAR W - 10% reflector/lens/wall losses = 99/8 = 12.4 PAR W/ft² or 617 PPFD. I think that would work well but not quite up to the intensity of the 1000 HPS DE in a 4X4 that many are comparing to (~950 PPFD, with hot spots and 40 CRi caveats) So you are right 5 would be better for those who want to get on the higher side of intensity but it does not play nice logistically if you have 4 separate tents. If your 4X8ft space is one tent with no walkways and you want higher intensity you could build 5 or 6 of those lamps instead of 4.
Another option, if we get access to the HLG-240H-C series drivers you could run 5 CXB3590s at 1.4A on the HLG-240H-C1400, although still logistically unfriendly in terms of using 5 COBs to evenly cover a rectangle space.. With the HLG-240H-C1750 we could run (4) CXB3590s at 62W ea @ 52.5% efficiency. That is 130 PAR W *9 = 117/8 = 14.65 PAR W/ft² or 729 PPFD.
Both 3 and 4 are factors of 24...so if you going 24 cobs...and are trying to spend as little as possible, plus the chips are already scaring your budget...why use strings of 3 and have to buy more drivers??? Put as many COBs as you can, on the least amount of total drivers possible. Each driver is 60$ plus shipping. Plus more wiring for your inexperience to possibly mess up.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 plant are going to be as short as possible I believe that I would get by beautifully with 15 PAR W/sqft which at that efficiency translate roughly into 30 Dissp.W/sqft. (always rounding up) which is 960 Dissp.W for the whole space.
Knowing that I could run CXB3590s at 1.4A at 49 Dissp.W gave me the idea the idea that I can get by with 20 COBs (980 Dissp.W) instead of 32. If I am wrong correct me! I am trying to get optimal coverage and wattage for my space at the least amount of money. I know that haven the 32 chips and running them soft is going to be ...... I am just trying to reduce costs as much as I can and at the same time keeping the efficiency over 50%.
I am still trying to figure out how to arrange 20 to maybe 24 COBs in the 4x8 so I can get as even coverage as possible. If everything that I've written here about the Watts, PAR etc. I am aiming for the bold numbers. If I could get any suggestions on spacing and number of COBs and also number of drivers, please!
Edit: I also have the idea of reducing the chips per bar to three thus covering everything with 24 chips. Just a thought.
Man, that a lot of juice! How many plants do you have under the fixture? How tall are they?Nice work. I think you could be shy on power (for max yield) using that in a 2x4' space. If you ran 6 3590s getting 40 dissipated watts each, you'd have sweet efficiency and you could keep em close but would that be par enough ~144?
My frame has a very similar outline measuring 31x12".
My plan uses 8cobs for ~230 par watts. Ive been hanging it at 12-16".
Or maybe i. overdoing it. I most def agree with your spacing. i think it would be better w 80w cobs.
CPU coolers aren't designed for passive cooling. You'd have to change them.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 together, giving me 15 PAR W/sqft. I am following numbers given to me by users in this thread. Having the short SOG plants I hope this is enough.
Edit: One more question concerning the efficiency. In the above setup, how low should I run the CXB3590 CD 3500K chips to get away with passive cooling. Or do I have to change the heatsinks all together to be able to cool them passively?
Thanks man, I figured that one out myself.CPU coolers aren't designed for passive cooling. You'd have to change them.
You can always buy a HPS if you're concerned about price per PAR watts.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 finally had all the data from the suppliers, from the datasheets, and from the advice you've had all given me, I made some simple calculation concerning more the financial side of the story. And I came up with the following:
All the prices are in euros and have been given to me by the suppliers that I have contacted
4xVero29 x 10 bars
10 x HLG-185H-C1400B x 43.90 euro = 439 + 45.07 shipping
40 x Vero29 x 24.79 euro = 991.60 + 112.67 shipping
1430.60
4xVero29 x 50.96 [email protected]@43.03% = 21.93 PARW x 4 = 87.71 PARW/bar
4xCXB3070 AD x 10 bars
10 x HLG-185H-C1400B x 43.90 euro = 439 + 45.07 shipping
40 x CXB3070 AD x 32.87 euro = 1314.80 + 112.67 shipping
1977.87
4xCXB3070 AD x 49.83 [email protected]@48.02% = 23.92 PARW x 4 = 95.71 PARW/bar
4xCXB3590 CD x 10 bars
10 x HLG-185H-C1400B x 43.90 euro = 439 + 45.07 shipping
40 x CXB3590 CD x 41.87 euro = 1674.80 + 112.67 shipping
2271.54
4xCXB3590 CD x 49 [email protected]@56.2% = 27.54 PARW x 4 = 110.15 PARW/bar
You can clearly see the difference in PARW and prices. The PARW is per square foot for my setup. Is it worth it to pay 840 euros more for 5 PARW increase per square foot, maybe for some people. I would be happy with even with less then 20 PARW/sqft, so I don't see the point of paying that much.
Anyway I am very glad for all your help, suggestions and advice. I think I have reached my final decision. That may not be the case in a day or two, because I thought that a couple of times already, but now I am happy with the cost, spread, PARW, everything. If there is something incorrect in the calculations or my explanation, anything, please comment on it, i really appreciate all your feedback. Thanks!
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 con, the excessive heat?You can always buy a HPS if you're concerned about price per PAR watts.
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 con, the excessive heat?
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.
I tried to hint you that you wouldn't be paying more for few PAR W more but rather for increased efficiency (which means less heat, lower demands on ventilation, etc).
HLG-185H-C1400 + 4x CXB3070 AB (@ $28.5 each) seems like the best compromise to me. I also have some doubts that 4x Vero29 + HLG-185H-C1400 would work at full power, though I haven't tested it.
Last time (a month ago) I asked Jerry from Kingbrite, I got quoted @ $28.5 for the AB bin and $36.5 for he AD bin.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.