Who has bought from Kingbrite Technology Co?
- Thread starter REALSTYLES
- Start date
Romz1
Member
I was thinking to use them as vegging lamps with these 50w 1.5A drivers (http://www.ebay.com/itm/20W-50W-New-High-Power-White-LED-Light-Lamp-Chip-Panel-Power-Driver-Waterproof/261571688928?_trksid=p2047675.c100005.m1851&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=20131003132420&meid=d8e128e275cd448c9bc6ce9208c745f2&pid=100005&rk=2&rkt=6&sd=111439908556&rt=nc), I think I found these drivers from one of your posts SupraSPL 
AquariusPanta
Well-Known Member
I honestly have no idea of how you all keep track of what's AB or Z-double-P.... or what ranks as better or worse. The extra head work is unnecessary in my opinion, then again I think too ideally at times. Apparently a single bin is asking too much of Cree. Instead they gotta have like +/- 10x different variations to make it 'fun' for us consumers.
REALSTYLES
Well-Known Member
AbeFroman
Well-Known Member
What list is showing a CXA3590 3000K CB? The one that I downloaded from Cree doesn't list that bin.
I don't think they come out of the oven as consistently as you'd like.
But, I'm curious how @REALSTYLES et. al. know they're getting the bins they're told they're getting. I remember a prior thread where it was said these cobs don't have part numbers on them. (I even wonder how you guys know you're not getting counterfeit product?).
AliExpress seems so shady the way they advertise lights producing 2-3x more light than they actually do. They have virtual impunity. All they're required to do is give you a 10% refund no matter how dishonestly they advertise their stuff.
REALSTYLES
Well-Known Member
KingBrite is on Alibaba.com not aliexpress. They sent me a picture of what you are getting and if they are counterfeit they did a great job I can't tell the difference lol
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They're the same thing. Express is geared more toward retail buyers (like the eBay of AliBaba). It uses an escrow service to protect buyers.
But, AliExpress's appearance of consumer protection is a joke. The terms of service require you to mail back items that weren't as described, or negotiate a settlement with the seller (which may be a 10% refund). You could order a leather wallet, receive a plastic spoon, and you can either mail back the spoon (for twice what it cost), or take a 10% refund even though you have no use for a plastic spoon.
As I understand it, the non-express version is essentially the same thing except there's no illusion of protections.
I hope it works out for you guys. I suppose anyone with a genuine CXA could measure lumen output and compare it to what they receive from Ali-whatever. I suspect a counterfeit would produce significantly lower lumens. But, concerning bins, it sounds like it's impossible to know if you're getting what you want.
I'm wary of ali-whatever. It's a gamble. If someone finds a dependable seller it's probably ok. Hopefully you have.
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REALSTYLES
Well-Known Member
SupraSPL
Well-Known Member
I suspect it would cost more to make a fake Cree CXA3070 or 3590 than it would to buy them. Chinese manufacturers ran into difficulty with the ceramic base. But you have an important point. I received CXA3070s from Digikey and a have bought 100 packs, sealed from Arrow. It is easy to compare the efficiency of lights that are the same color temp or close color temps using any cheap light meter and a multimeter.
So I ordered a CX3070 3000K AB bin "claimed" from Aliexpress and compared its lux and dissipation with the known Z2 Z4 and AB bins I had on hand. In the first test great news the Aliexpress CXA slightly outperformed my Arrow AB bin. So I ordered a bunch more from the same seller and tested a random sampling of them, same story amazing performance I would expect from AB bins. Also worth mentioning, at low current the Ali COBs strongly outperformed the Vero29s that I received from Digikey and hugely outperformed the best generic 100W COBs I have come across so far. The only problem, the Ali seller charged me $25 for shipping even though it said free shipping and then packaged the COBs so poorly I am lucky they survived!
So at this point I don't expect we are going to run into "fakes" but we may receive Z4s instead of ABs if the AliExpress sellers get mixed up or get shady on us. I have some ABs on the way from Kingbrite and will report back on their performance.
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SupraSPL
Well-Known Member
I honestly have no idea of how you all keep track of what's AB or Z-double-P.... or what ranks as better or worse. The extra head work is unnecessary in my opinion, then again I think too ideally at times. Apparently a single bin is asking too much of Cree. Instead they gotta have like +/- 10x different variations to make it 'fun' for us consumers.
AZ is right, they come "out of the oven" with a bell curve distribution of characteristics, including efficiency. The top bins are rare, cream of the crop. From what I understand it is the nature of all diode production.
Imagine if you went to a car dealer and they said you might get 25 mpg or 35mpg depending on luck, and the chances of 35mpg are not in your favor. The dealer next door sorts the cars by mpg and prices them accordingly. Assuming mpg was a huge factor in our decision and the price wasnt much different, I think we would be wise to buy the sorted car.
For example some people are using LEDs in applications that do not run long hours, so efficiency may not matter quite as much to them. They can take advantage of low priced bins but applications like ours can take advantage of the extra efficiency. So I am thankful for brightness bins, it gives DIYers an extra edge. If we were to demand the manufacturer provide only 1 bin, you can bet it wouldnt be the top one.
I understand it can seem complex and has a steep learning curve for new DIYers. To make matters more difficult to keep up with, we are in a period of change, but it is change for the better so I am all for it.
REALSTYLES
Well-Known Member
I'm thinking of getting a 5' x 10' tent and put 4 panels in it. Of course my 413 watters or would that be overkill?
REALSTYLES
Well-Known Member
So a 4' x 8' would be killer= 51W/ft² and I was thinking of getting the 12" wide heat sinks four of them at 12" long so I can spread the light more. They would go with the 2 I already made 4 cob to each 12" sink.
AquariusPanta
Well-Known Member
How weird, I was just thinking of your car analogy before you posting this. This is due to this current conversation at hand, within this thread, and my thoughts about the Vero lineup - which does not share a binning categorization like the one Cree uses.
This means one of two things:
Either BridgeLux has machinery that accurately and precisely pushes out COBs that offer the stated performance that can be found within the data sheets....
OR they have similar machinery, such as Crees, and instead of giving the consumer the tools necessary to determine exact model information, withhold that valuable information from the common DIYer.
The only way one could establish BridgeLux's credibility over this issue is to buy and test a whole lotta COBs.
My opinion is that both Cree and BridgeLux Vero offer the best COBs to my knowledge and that each have a little perk about one another. Cree boasts the muscle (efficiency), while BridgeLux Vero offers mobility and simplicity. I'm just happy that I got choices all around AND good ones too!
@az2000
Vero sort of spoiled me, as you can tell
.
SupraSPL
Well-Known Member
Ya anything you can do to get the spread as even as possible. I run at about 35W/ft² equivalent which is borderline to give me white tips on some ladies, so I cannot say if 50W is too much. There are some who have done it, @foreverflyhi comes to mind.
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SupraSPL
Well-Known Member
Good points AP. Bridgelux handles it by offering the LEDs with a wider range between the "minimum" and "typical" flux figures than Cree. Someone mentioned that Bridgelux gets their Vero diodes from Toshiba. Maybe Toshiba skim the top bins off sells them to NASA or something. Orsam deals with it by selling their LEDs as a range of bins in a single part number, like a bin lottery.
REALSTYLES
Well-Known Member
Fuck yeah I just won an auction on ebay for a 4' X 8' X 7' grow tent for $115.50 and $39.99 for shipping. Now I have $7844.51 left in my budget lol.
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