Airwalker16
Well-Known Member
Pics or it didn't happen.
DiY LEDs - How to Power Them
- Thread starter SupraSPL
- Start date
Airwalker16
Well-Known Member
I'm outta here. Peace.
palmetto420
Member
Thanks again Jorge!
My plan is to go with your second idea. (2 fixtures, lights 12" apart)
It'll give me the flexibility that I'm looking for
These are the individual heat sinks that I ordered: https://www.cdiweb.com/PortalProductDetail.aspx?ProdId=574061&fmt=1
JorgeGonzales
Well-Known Member
Did you already order those? I used them in my build, but I didn't mention them because they really aren't suitable to a CXB3590. I'm not sure there are suitable mounting holes, and it's definitely going to have a lot of air space behind the cob.Thanks again Jorge!
My plan is to go with your second idea. (2 fixtures, lights 12" apart)
It'll give me the flexibility that I'm looking for
These are the individual heat sinks that I ordered: https://www.cdiweb.com/PortalProductDetail.aspx?ProdId=574061&fmt=1
palmetto420
Member
I did and the order is non-returnable...
I guess I can always throw them on the bay.
The ones I wanted to get at Cutter are on back order with an eta of 5/16. Know of any other place that may have what I need in stock?
I guess I can always throw them on the bay.
The ones I wanted to get at Cutter are on back order with an eta of 5/16. Know of any other place that may have what I need in stock?
JorgeGonzales
Well-Known Member
You might want to ask about returning anyway, all they can say is no. I actually don't know of anything suitable, which is why I mentioned heatsinkusa.
I'd just wait for the cutter sinks, honestly, or drill your own pin sinks if you can find them. They work well for bigger cobs because they have that nice flat base at the bottom.
CDI will have the same pin sinks in stock, same 2 week eta, but not pre-drilled for a CXB3590. They are only $17 though. Maybe ask if you can exchange?
The heatsinkusa option is heavier, but a lot less room vertically, so it has advantages in your setup potentially.
palmetto420
Member
Thanks again Jorge! I called to cancel but she didn't know if it was too late or not so we'll see.
I guess I'll just wait till Cutter gets them in stock...I still need to get the cobs and everything else so I guess it's no huge rush.
I guess I'll just wait till Cutter gets them in stock...I still need to get the cobs and everything else so I guess it's no huge rush.
nevergoodenuf
Well-Known Member
Another place to look is your local electronics recycler.
Bill Lidgate
Active Member
I was using a Vero 29 Decor for the numbers, and as always "lumens are for humans" as plants (and Decor series) have a lot of wavelengths outside the lumen area. The real deal for plants is PAR, but for any given LED PAR is directly proportional to lumens, I believe.
For all the modern high powered COB LED I've looked into a 4% increase* in Vf (typical) leads to:
~50% increase in LED current (A)
~55% increase in LED power (w)
~40% increase in radiant emissions (Lm or PAR)
~10% decrease in radiant efficiency (Lm/w, PAR/w)
There's no such thing as a free lunch, the 15% of power which doesn't go into radiant emissions goes to HEAT and must be dealt with. Feel free to check my numbers, the Bridgleux spec sheets include over voltages making this simpler.
* Bridgelux lists the Vf (max) of the Vero 29 as 106.3% of Vf (typical) so a 4% bump in Vf doesn't seem too crazy, if the heat is dealt with.
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JorgeGonzales
Well-Known Member
Talking about overvolting leds hurts my head, since we usually talk in terms of drive current for cobs, and then Vf becomes a function of temperature at that current.
But undervolting makes more efficient light, period. You just spend more in cobs. That point stands.
I'm not sure anybody has the right answer to spectrum vs efficiency. Personally I am 100% not sure if it's worth trading higher CRI and a better looking spectrum for lumens efficiency. It might totally be. Lumens are for humans, but plants use everything in the lumen range at varying efficiencies, and when one light is 180lm/W and another is 90lm/W, well, thats a big hill to climb.
REALSTYLES
Well-Known Member
It came from @Airwalker16 and I'm not here to fight. I've already helped several people on different forums and I answer all the questions in my inbox and if I don't know I'll ask someone who does and then I'll give them solid advice. I've learned that some of guys don't know shit and act like you do. There are guys on here that know there shit and I read their post with the confidence they know their shit and a real help to this community. Wouldn't shit without their knowledge that they shared.
So drivers are more efficient when run at close to max. What are the real life consequences of running them more lightly loaded? A few watts lost?
REALSTYLES
Well-Known Member
Yes had that problem with CXA3590 72v but not with the CXBs lol
JorgeGonzales
Well-Known Member
The real life consequences are provided by manufacturers in the datasheets.
For instance, here is the HLG-185H load vs efficiency chart:
At 115V the difference between lightly loaded at 25%, and maxed out is approximately 3%, or 1.5W total for a 50W grow.
Which is why I suggest you ignore all of the pointless dickwaving around here, and research things yourself.
By the way, any non-HLG Meanwell driver won't even match the 90% efficiency of this one loafing along at 25%.
Airwalker16
Well-Known Member
So you're saying it'd be just fine to use a 2100 at 700ma dimmed with little consequences?
REALSTYLES
Well-Known Member
I know you were talking about me and I won't say his name. You seem mad for no reason. What I say must don't mean shit and I just read what the real led gurus do Like @SupraSPL and @Greengenes707 they know their shit as well as @Rahz and @robincnn but you and @Airwalker16 are overnight pros and you need to relax. Not once have I called you or airwalker16 names. But I'm suppose to be mad yeah I'm not name calling.
JorgeGonzales
Well-Known Member
Who did I call names? This is pointless dickwaving, by the way. In case you were curious what it meant.
You know, I had an account here before, and am quickly realizing why I left.
You just want to win an argument, not talk about the truth or help anybody. If you see a mistake, point it out and discuss it. Don't shit all over the thread bragging about owning THE MOST EFFICIENT COBS IN THE WORLD. We already know, you say it every chance you get.
Meanwhile, a guy asks if he can run his cobs dimmed down for the first couple months of his grow and the fucking must-run-every-driver-at-99.999999999999999-of-capacity brigade shows up and acts like a bunch of assholes reguritating information from all the people you just listed, without understanding any of it.
REALSTYLES
Well-Known Member
Just reread what you typed. I have helped more people than you can imagine and yes efficiency is important. I hope you learn how important it is one day
Airwalker16
Well-Known Member
Sooo super important. Even though the worst efficiency you could get from a meanwell would DESTROY anything people have used for the past 30+years.