HLG-185H-C1050B i got too many

alesh said:

I'm not convinced that it will work as well as you're saying. Hope you'll prove me wrong. With the high efficiency of the latest COBs I think that using water to take away heat is over complicating and unnecessary. I am getting the price of about $0.1-0.2 per dissipation watt with passive HS (@75cm^2/W).

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Doer said:

How about if I was able to get 16 COBs and 4 Drivers per rail.

1600w Would that be worth it?

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alesh said:

Don't get me wrong. It's an awesome setup. I just think you could build a more convenient one with less effort using usual HS (either passive or active). Doesn't make your solution wrong.

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Doer said:

Oh, I know for sure, you are not saying that. You and I are very straightforward and I like plain talk.

What I am asking, is at what level can I exceed a more conventional design and to do that I have to use water.

So that is why I asked you. You have the knowledge in detail. So, I asked would 1600w in that footprint justify water plumbing in your mind?

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alesh said:

TBH, I believe that you'd run into problems with too high light density before the problems with cooling (I'm talking about CXB3590). If we can agree that an average of 1500 umol/s/m^2 is the goal, there will never be a need for you to remove more than about 320W/m^2 (3590 @50% efficiency) -- an amount well manageable with conventional HS.

My idea of perfect design is close to what SDS does or what most most commercial LED lights - an enclosed, plug&play, maintenance-free unit. Kind of the opposite of what you're making. Therefore my answer would be no. This answer might be a little biased, though.

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This argument will go away, eventually. LEDs are improving - hitting 70% efficiency now - and soon they'll produce almost no heat. Ie if today's 70% LEDs are improved to 80%, the output will improve by 14% while the heat will be reduced by 33%.

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AquariusPanta said:

Could you please explain to me what you mean when you say "output will improve by 14% while heat will be reduced by 33%"? I don't fully understand where those numbers come from, because 80-70 is 10%, so I must be missing something.

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stock said:

Hi. I bought by accident too many drivers extra 10 pcs ,and i don't need them .So i wonder ,if anybody need them .I am not sure ,if this ok or not to post this in led section ,but i can't find any other place to post this type of ad .To Mods ,if you think this is not ok for this post ,then go ahead and delete it .
Thank you

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