YepThanks! Hmm I have just asked him, and he gave me their PayPal account name to transfer money to... Did you do that too? or?
What list is showing a CXA3590 3000K CB? The one that I downloaded from Cree doesn't list that bin.I was after the CXA3070 3000K ABs or CXA3590 3000K CBs.
For vegging I would take the CXA3070 5000K ADs or the CXA3590 5000K CDs but I think we can get CXA3070 5000K BBs soon and possibly a new bin of CXA3590 cool white will appear, the DB LOL
I don't think they come out of the oven as consistently as you'd like.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.
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 lolI 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.
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.KingBrite is on Alibaba.com not aliexpress.
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.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?).
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.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.
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?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.
View attachment 3352153
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.
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.Assuming no aisles, that would give you 33W/ft², a very good level of intensity, especially with reflectors or lenses added.
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.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.
View attachment 3352153
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.