Danielson999
Well-Known Member
Well, I like his description of everything in the video alot better than a single graph.
Matching Drivers and COBs
- Thread starter SupraSPL
- Start date
so i have to refer to this graph ? :
BOBBY_G
Well-Known Member
i hear this but dont see it in practice. youd have to run them pretty hard to even get within 10% of the 3590s.
at typical "high currents" (for us) of 2.1-2.4A the 3590 is about 15% more efficient
not that the veros arent a bargain (85-90% of performance at half the price), but the 'about the same' might be a stretch
vero:
3590 CD
bassman999
Well-Known Member
You are right, not as close at the higher currents as I had remembered
BOBBY_G
Well-Known Member
4 cobs on a 320 is 80W each and is prob better. wayyyy more efficient than running them over 100W
Danielson999
Well-Known Member
That's why some run Vero's hot where they are equal in efficiency with the CXB's. 125w and up it's basically dead even. The 4000k Vero 29 @3150ma gets 123lm/w. The CXB is about 129lm/w. Splitting hairs at higher currents but the Vero gets a slight win because you can buy more for same amount of money.
radrolley
Well-Known Member
Very cool. Has there been a lot of testing on the life of these COBs? It wasn't a DIY but I was looking at Apollo brand COBs. There were many complains of them burning out after months of use. The company supposedly has great customer service and was good about replacements but they burned out prematurely as well. I know for a fact these newer LEDs are excellent. I use them myself.
BOBBY_G
Well-Known Member
not run at 50 W
it would be a stretch even maxing them out at 170W each
say 18 PAR W/SF x 16 SF = 288 par W
running them as hard as you can (4.2A/170W) they are ~34.5% eff (110 lm/W) youd get 234 par W
you could do it with [email protected] Amps
a better fit would be 6 @ 3150ma (124W each, 38% eff) =>283 PAR W
it would be a stretch even maxing them out at 170W each
say 18 PAR W/SF x 16 SF = 288 par W
running them as hard as you can (4.2A/170W) they are ~34.5% eff (110 lm/W) youd get 234 par W
you could do it with [email protected] Amps
a better fit would be 6 @ 3150ma (124W each, 38% eff) =>283 PAR W
hiluxphantom
Well-Known Member
Umm.. would elg-150h-c2100 or elg-150h -c1750 end up with higher lumen output on 2 cxb3070 3500K BB?
and bunus question approx how many ballasts can you run on one 240V line/?
and bunus question approx how many ballasts can you run on one 240V line/?
alesh
Well-Known Member
That's a tricky question. It will be close, I'd have my money on C1750.
Number of drivers depends on the circuit breaker.
littlejacob
Well-Known Member
Bonjour
No!
I tryed 4 cxb3590 @1400mA over a 3.5x3.5x4.5 and it was ok but not enough light intensity!
The minimum for a 4x4 to get descent results and to have light everywhere is 9 cxb3590...(450w)
A cxb can cover pretty well 1.5ft2...no more...but you should start with 200w...4 cxb3590 @1400mA on separate hs...if you want to cover the biggest area possible it is the way to go 1cob 1 hs! (I done that to cover my box with 4)
I have a 4x4 too and my goal is 16 cxb [email protected] I guess I will have to dim it because 50w ft2 is a lot with those cob...I guess 35/40w is more than enough to break the scale...lol!
CU
Ok folks, so Ive come to a point where Im ready to buy my cobs and my power supplies. But i need help deciding which driver is best suited for my needs. Ive decided I want to make 8 cob bars with 4 cobs each, driven at 75W per cob (300W per bar) and have 4 CPU fans per bar (1 per cob). Im buying the Vero29 V2 4000K 80 CRI bins. Im looking into buying 8 of these drivers http://ca.mouser.com/ProductDetail/Mean-Well/HLG-320H-36B/?qs=sGAEpiMZZMt5PRBMPTWcaRTgZe1UVjfleDe6SlkiSzg=
Will I be able to drive each bar at 300W and power 4 CPU fans on this 320W driver?
Will I be able to drive each bar at 300W and power 4 CPU fans on this 320W driver?
alesh
Well-Known Member
You probably won't get full power with this driver (too low voltage).
BOBBY_G
Well-Known Member
i wouldnt plan on running the fans off the driver, get a separate little 12V or whatever power supply for that. the driver at full power will run your cobs at 80W. im literally doing the exact same setup here soon with cxb3590s
btw, thats a ripoff for that driver. everyone else (TRC, sager, onlinecomponents, etc) sell it for about $108:
http://pge.powergatellc.com/product_info.php/products_id/5157?osCsid=7pt636rgdcegilrhci6ahkv3qol7gmekur8ovf90dev4lb01blm0
btw, thats a ripoff for that driver. everyone else (TRC, sager, onlinecomponents, etc) sell it for about $108:
http://pge.powergatellc.com/product_info.php/products_id/5157?osCsid=7pt636rgdcegilrhci6ahkv3qol7gmekur8ovf90dev4lb01blm0
bassman999
Well-Known Member
NP problem thanks for pointing it out. I want to help ppl make the best decision, but I dont know everything, and more info is always better bro!
108 CAD? or USD?
Part of me also is considering 3070 3500K TOP BIN cobs too. The Vero29's in Theory seems nice, but the 3070's have far more evidence backing them up. Every grow I see with the Vero's the buds are loose and the yield isn't up to par. Am i wrong? I think I should build both and see for myself. Its soo hard to decide these things when your spend $5-6grand
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Danielson999
Well-Known Member
That's the problem with Vero 29's. Running 4 off one driver leaves you little in terms of choices. If you ran 3, 5 or 6 everything would be much easier. Running 4 cobs is a perfect match for Cree. If you ran them at 50w each the HLG-185-1400 would be perfect. You'd probably have to order everything from Kingbrite though but the prices for Canadians at Cutter are pretty reasonable too. You could also run the Vero's at 50w each with an HLG-240-1400 so there's that option too.
Danielson999
Well-Known Member
The prices you saw in his link were Cdn. A $108usd driver will be around $160-$170 once you hit it with the exchange rate and shipping/duty. Here's the deal for us Canadians. If we pay $45usd for a Cree, then shipping/tax say it works out to $60usd per cob. That's at least $80cdn for one Cree cob. We can order Vero 29's for $37cdn per cob and it ships from here in Canada for next to nothing. It's hard to justify buying Cree for us in the current state of the economy/exhange rate.
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nevergoodenuf
Well-Known Member
Unless prices have changed, the HLG 240 is the best dollar per watts. Even over the HLG 600.