indecision has struck. Effeciency vs delivery.

churchhaze said:

8 cxb2530 u2 on 2 bars of the 5.886" profile using 1 HLG-120H-C500 would be pretty nice.

Edit: Forgot you already have a driver... doh.

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Well, in all technicality I could always just run two strings of four in parallel. Worked well enough for mr. flux. Though I think two bars would be pretty excessive don't you think? I think two bars of the 4.85 profile, 24" in length would be more appropriate for something like that.

Know where one could get top bin, CXB2530's of the 4000k 70cri variety?

alesh said:

I was asking myself the same. Unfortunately I wasn't able to find any suitable AC fan. Everything I found was too big/powerful/noisy or unsuitable design. I did not search that well TBH.

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I've seen some with a little dimming knob attached to them. They're usually pretty expensive compared to normal DC fans.

Course, I guess it's about the same if we compare to high end DC fans like noctua.

bicit said:

Well, in all technicality I could always just run two strings of four in parallel. Worked well enough for mr. flux.

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That's actually a really good idea. With strings of 4, it'd be very likely to find a good match, and if you accidentally disconnect 1 string, you will end up putting 1000mA through the other. Check!

bicit said:

Though I think two bars would be pretty excessive don't you think?

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No! (maybe) Use 2 bars or be sent to the led concentration camp.

Seriously though, the 5.886" is a very good value, and I think perfect for smaller cobs with the thinner base.

Maybe just a little bit overkill? hmm. however, you might be more likely to look back and wonder why you didn't spend 40-50 more dollars on weight in aluminum when you had the chance. The feeling of regret could go either way.

churchhaze said:

Maybe just a little bit overkill? hmm. however, you might be more likely to look back and wonder why you didn't spend 40-50 more dollars on weight in aluminum when you had the chance. The feeling of regret could go either way.

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Well, I'm just thinking that it would be almost as wide as the tent with two 6" heatsinks right next to each other

Wall to wall heatsinks

Something a lot of people forget is that aluminum is not technology, it's a commodity, and machining it is hard work and uses a ton of energy. The price of commodities will likely go up slowly over time, while the price of out dated technology will go down.

Since you learned how to tap it (or already knew how), you can always use it in a future project, as long as you remember how fasteners and tapping works. (or kapton tape)

bicit said:

Wall to wall heatsinks

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That's basically the idea. 4 Y hangers, 4 ratcheting pulleys. It's just one way to do it. You could also get the 12 inch profile at 28" inches long!

You say you have 18" depth, right? That can fit 2 with lots of clearance!

alesh said:

You'd need to connect the regulator in parallel with the COB. It wouldn't change the voltage needed for the whole string but the COBs would be getting less power (power of the fan + losses on the regulator).

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So slightly reduced current available to the cobs proportional to the power draw of the voltage regulator(fans). So would that mean that the regulator would also need to be capable of handling a 148v impute, correct?