DUET 2400 (LED FIXTURE) - UP TO 2400 WATTS (Flip Chip Opto)

nevergoodenuf said:

This is a size comparison between the Luna 300 and the Citizen CLU056.
View attachment 3685749

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can you compare it with the current citizen gen (there are at least two different size CLU058 )

Bill Lidgate said:

IMHO trying to duplicate SOL (point source LED COB at 500-2400W) is just silly as you run into similar heating issues with uneven light distribution.
Its much better to distribute your LEDs over the entire grow area; everything is better with a multitude of light sources.

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Yeah I agree with you.

Bobby the size is the same on the CLU056, 058, and 550. The CLU550 has 2 + and 2 -, but same size.

nevergoodenuf said:

And Alex, they are really loving these lights!!! 4 of your COBs covering a 5'x8' area
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What color is the light these big cobs emit?
Sorry for the lazy ass question, I know the info is here somewhere

White.

@OneHitDone I am using the Luna 300's, not the Duet, I am done with blurple (maybe).

nevergoodenuf said:

@OneHitDone I am using the Luna 300's, not the Duet, I am done with blurple (maybe).View attachment 3700881

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How many of these 300's would you recommend over a 5x5?

4 maybe? at 200-250 watts each.

nevergoodenuf said:

4 maybe? at 200-250 watts each.

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What's a rough cost per cob with heat sink and driver?

I am am not sure, I am buying bulk and pay in the neighborhood of $150. Plus the 2 week wait to make plus shipping from Taiwan @ $3 a pound, for Air instead of ship shipping.

To make a simplistic analysis, the power density at the thermal interface tells you a bit about how hard its going to be to cool a given LED.

so Watts / surface area (SA) of the pad shows how much heat is going to have to be pumped to the heatsink/water pipe/air to keep the chip from cooking.


this is not totally fair, as the inFLUX has individual SMD LEDs with much smaller SA on one side of the pad, while the Duet 2400 has almost the entire pad filled with LEDs, but as a first approximation it does let you know how much effort is required to lose the heat from the LED/pad combo. The Duet has a real thermal bottleneck that needs to be compensated for with a HUGE thermal sink on the other side, and water cooling should probably be mandatory IMHO.

Bill Lidgate said:

The Duet has a real thermal bottleneck that needs to be compensated for with a HUGE thermal sink on the other side

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So why would we want to deploy the duet as a grow light ? Seems to contradict everything I have learned.

- more modest sized light sources for a more even coverage versus a large single point source
- significant height required
- duet's efficiency is lower than CXBs.

Seems bigger is not always better. don't get me wrong, I love seeing nevergoodenuf's grows and they are showing us that they grow well, but I'm trying to understand what the advantages are.

Those could only be use in green house grows, I would think.

nevergoodenuf said:

Those could only be use in green house grows, I would think.

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Or for growing crops on the far side of the DMZ, LOL

We don't want the duet. They just want to post new threads and say "most powerful".

Let me see "most efficient" instead of pointing out the better cooling of flip chip over wire bonded cobs then boasting a chip that creates more heat...