Will a 36-42v cob run off of 35.75v?

[bassman999]

My only problem is the fact that I'd probably end up cranking it up on accident and burning up all my chips! Not that I would actually do so, but it could happen. What I want to know is in the case of running a series circuit, what if you have say for example 6v leftover. Would you actually have to dial the voltage down, or would you have to use a resistor for leftover volts?

Series wiring with leftover voltage isnt forced into cobs, but just results in a slight loss of potential and efficiency loss

 

[sanjuan]

What did a dozen of those 3590's run you and did you get them through Kingbrite led? How long does it take when ordering from them and how easy is it to reach them with an order?

I'd never dealt with alibaba before so I bought the first four CXB3590 from Mouser for about $80 each and the rest from Jerry for maybe $60 each, delivered. DHL is extremely fast, like a couple days to Seattle.

It was easy enough to deal through alibaba, pretty much like ebay. Jerry sends out the emails about every two weeks, this is from 13 days ago:

 

[lumen-geek]

I'd never dealt with alibaba before so I bought the first four CXB3590 from Mouser for about $80 each and the rest from Jerry for maybe $60 each, delivered. DHL is extremely fast, like a couple days to Seattle.

It was easy enough to deal through alibaba, pretty much like ebay. Jerry sends out the emails about every two weeks, this is from 13 days ago:

Damn!! I thought you could get 3590's through Jerry for $40ea, which may be the case but what does he charge to ship em? Surely not $20per led...right?! Too bad that list of stock doesn't have prices listed as well.

 

[speyfly]

Kingbrite (DHL) shipping was $60 for 8 cobs and 8 heavy ass glass lenses, had to be 8-10 lbs. Had them in my hands in 9 days.

 

[sanjuan]

I bought my COBs a while ago, prices have gone down at kingbrite and up a little at mouser. My order included a dozen 100mm lenses--not sure if I'm going to use them, probably not at first.

My latest order was for a dozen CXB3590 5000K CD (passive veg) and it was $40 for shipping plus 4.5% merchant paypal fee. I paid $47.50, it looks like they are 46 now.

 

[speyfly]

I opted not to install my lenses too, want to see how it does on this grow, Pretty soft and even coverage getting OK canopy penetration. Will do a little pruning to open things up.

 

[lumen-geek]

Anybody ever heard of Cutter.com? To get to the site you actually have to enter cutter.au.com as the company is based in Australia. I'd never heard of them until I saw an ad on this site for cree cxa3070 for $32.99 and cxb3590 for $45.99. I also noticed there was a discount code for this site, I unfortunately didn't write it down and can't remember what it is?!! Something like"rollmeone" but I doubt that is it. Anyone else see this ad, if so do you remember the code?

 

[Blinky38]

I do have a question which is quite the same but the other way around. The hbg-100-36 has an output range of 21.6-36v. I want to power a cxb3590 36v at 2.7a but this will run at approx 37v. Will this work?

 

[bassman999]

I do have a question which is quite the same but the other way around. The hbg-100-36 has an output range of 21.6-36v. I want to power a cxb3590 36v at 2.7a but this will run at approx 37v. Will this work?

Simple answer no, at last my CXA3070 at 1.3A started clamping already and only 36.1V
At 36.1V it will start to co
clamp power gradually.
I am returning a pair of hlg-186H-36B for that exact reason

 

[welight]

Anybody ever heard of Cutter.com? To get to the site you actually have to enter cutter.au.com as the company is based in Australia. I'd never heard of them until I saw an ad on this site for cree cxa3070 for $32.99 and cxb3590 for $45.99. I also noticed there was a discount code for this site, I unfortunately didn't write it down and can't remember what it is?!! Something like"rollmeone" but I doubt that is it. Anyone else see this ad, if so do you remember the code?

Guys CXB3070 USD31 not USD32.99, CXB3590 is USD42.99 ea not $45, can ship 2 days to US via DHL for less USD20 discount code 'CUTANDROLL'

 

[Blinky38]

Thanks

 

[lumen-geek]

Guys CXB3070 USD31 not USD32.99, CXB3590 is USD42.99 ea not $45, can ship 2 days to US via DHL for less USD20 discount code 'CUTANDROLL'

I was simply quoting the prices I saw on cutter.au.com last night, but am stoked that someone else was paying more attention to detail! lol So have you ever ordered thru them? Prices seem to be close to what Jerry at Kingbrite has?

 

[lumen-geek]

Guys CXB3070 USD31 not USD32.99, CXB3590 is USD42.99 ea not $45, can ship 2 days to US via DHL for less USD20 discount code 'CUTANDROLL'

I just found this on their site for $30.66 USD each before the discount. Might be able to afford the 3070's at this price!

 

[welight]

I was simply quoting the prices I saw on cutter.au.com last night, but am stoked that someone else was paying more attention to detail! lol So have you ever ordered thru them? Prices seem to be close to what Jerry at Kingbrite has?

I would say our 1 off price close to his 500 up price

 

[lumen-geek]

I would say our 1 off price close to his 500 up price

What???

 

[welight]

What???

Dear Valued customer,
Nice day!
I am Jerry from KingBrite, it is my pleasure to support you.

I am writing to update you the latest price list, and the latest stock list.

1. The latest prices below:

samples(＜20pcs) 20-49pcs 50-99pcs 100-199pcs 200-299pcs 300-499pcs 500pcs
CXA3070 US$22.50 US$21.50 US$21.00 US$20.50 US$20.00 US$19.00 US$18.50
CXB3070 US$32.50 US$32.00 US$31.50 US$31.00 US$30.00 US$29.50 US$28.50
CXB3590 US$46.00 US$45.00 US$44.50 US$44.00 US$43.00 US$42.5 US$41.5

ok so maybe his 300-499 price, if you bought 500 from me we would be below $35
Cheers
Mark

 

[lumen-geek]

Dear Valued customer,
Nice day!
I am Jerry from KingBrite, it is my pleasure to support you.

I am writing to update you the latest price list, and the latest stock list.

1. The latest prices below:

samples(＜20pcs) 20-49pcs 50-99pcs 100-199pcs 200-299pcs 300-499pcs 500pcs
CXA3070 US$22.50 US$21.50 US$21.00 US$20.50 US$20.00 US$19.00 US$18.50
CXB3070 US$32.50 US$32.00 US$31.50 US$31.00 US$30.00 US$29.50 US$28.50
CXB3590 US$46.00 US$45.00 US$44.50 US$44.00 US$43.00 US$42.5 US$41.5

ok so maybe his 300-499 price, if you bought 500 from me we would be below $35
Cheers
Mark

Didn't realize Kingbrite had cxa3070's so cheap! Thanks for the info, at those prices Kingbrite is definitely the place to order from.

 

[welight]

Didn't realize Kingbrite had cxa3070's so cheap! Thanks for the info, at those prices Kingbrite is definitely the place to order from.

what can I say dude your totally right. only my CXA3070 would be lower than that as well, but why would you buy CXA when CXB is 33% more efficient

 

[kmog33]

So why are you selling your cxbs for?


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[kmog33]

what can I say dude your totally right. only my CXA3070 would be lower than that as well, but why would you buy CXA when CXB is 33% more efficient

What's your price on the 3070s? And probably because they cost 50% more for 33% added efficiency, which doesn't 100% balance out. But if you're getting rid of cxas for less than 20 usd pm me I'll grab a bunch.


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