Shredderthirty
Well-Known Member
how close can you place the CXB3590s to each other?
This isn't an absolute number. It depends on whether you're passive or actively cooling, size and shape of your heat sink, how hard you're running your chips and intended environment.how close can you place the CXB3590s to each other?
If temperature droop isn't as much of a concern as current droop when calculating efficiency, what is a good number to stay below?True, I have had odd readings as thermouple got near LES or just close enough that light messed up the reading.
For vero 29 I use ledil reflector holder and it shields Tc point from any light or radiation heat from LES.
With cree I am still testing Tc but the ideal connector blocks Tc point.
I'm pretty sure that two of those big fans would be plenty, as long as they're getting reasonably cool air to work with. If they're stuck up in the top of a tent without ventilation for example, they'll get hot just because there's nowhere for the heat to go.yeah i know it was a vague question but i typed out a lil paragraph up higher and it just got skipped over so i just threw that back out there, lemme copy and paste from above
so i'm just trying to imagine how much power i can ultimately run on this 10" by 36" heatsink. right now i have 200 W on it passively cooled with eight CXB3590s.
I want to put 200W more on it for sure and know it could take that, but the question is how close can you place the CXB3590s to each other? i guess it depends on how many watts are going to each cob.....really i was just bored and imagining trying to put 8 more CXB on this heat sink but that would require to get two rows 3 cxb wide on a 10" wide heatsink to properly space them all out....
I only really planned on putting 14 on this heatsink and running seven cxb/hlg-185-c700 but i've been thinking about cooling it with two large fans like the one @REALSTYLES uses and going with three drivers to power 16 cobs (two with 5cxb and one with 4cxb)
'But anything below 65C would not be my preference. Don't ask my why' = ???Try as cold as possible.
Here is more for Vero cob. Cree should be similar. Will see if I can get LM 80 for cree
Try keep Tc below or at 55C are you are cool. Your cob will last long and minimal or no lumen loss at 10000hrs
Reach 85 C and be prepared to lose a little. 2% lumen loss at 10,000hrs
Reach 105 and 4% at 10000hrs.
I don't have any data beyond 10000hrs. But anything below 65C would not be my preference. Don't ask my why
Bonjour'But anything below 65C would not be my preference. Don't ask my why' = ???
Did you mean 'beyond 65C'?
100F = 37.77C. My plan is to keep the temp right around here, +/- 5F. What am I giving up by not running at 70F? 50F? Forget how to do it for the moment, I'm just interested in what the upside might be.
Bonjouryeah i know it was a vague question but i typed out a lil paragraph up higher and it just got skipped over so i just threw that back out there, lemme copy and paste from above
so i'm just trying to imagine how much power i can ultimately run on this 10" by 36" heatsink. right now i have 200 W on it passively cooled with eight CXB3590s.
I want to put 200W more on it for sure and know it could take that, but the question is how close can you place the CXB3590s to each other? i guess it depends on how many watts are going to each cob.....really i was just bored and imagining trying to put 8 more CXB on this heat sink but that would require to get two rows 3 cxb wide on a 10" wide heatsink to properly space them all out....
I only really planned on putting 14 on this heatsink and running seven cxb/hlg-185-c700 but i've been thinking about cooling it with two large fans like the one @REALSTYLES uses and going with three drivers to power 16 cobs (two with 5cxb and one with 4cxb)
I'm well my friend, hope you are the same!Bonjour
How are you my friend?
I am not sure you could go this low in temperature...
We should ask @SupraSPL the temperature of his cob on his biggest hs! And how low the temperature could be @1400mA!
Have a great day ★
I'm thinking that much below about 65F there's too much risk of condensation, so that's not really a viable option.Depends what the cost would be.
If you can run your cobs at -35°c (just a random negative numba) with no hassle whatsoever or extra cost, then trust me, you should.
Just look at PCT ... with cxb3590 between +25 and -35 a CB bin is superioir to a CD !
I don't know how the math works but I went with the 10" profile 6" long. (thanks supra). I am in the process of building it.Hey guys, I'm looking at this sheet for a cxb3590 CD 36V @1.4A. How do I calculate how much heatsink I need from hsusa? I know I 40cm^2 per watt dissW@50 for active and 120cm^2 for passive.
I think I need 7.5" of the 5.88" profile, active cooling. Am I correct?
I'm asking for the math cause I thought I got that part, but someone questioned it, in another website. So I'm just trying to verify here. Thanks though.I don't know how the math works but I went with the 10" profile 6" long. (thanks supra). I am in the process of building it.