First Cree Build

[TomBombadil420]

Hello my friends, I want to let it go the Mars Hydro 300W and I have read that it can be upgraded with 2 Cree CXB3950 but I do not trust in the driver and I prefer to build something myself.

My tent is small 24x24x48" I think you told 2x2 right? So I i´m reading a lot and see that 2 CREE CXB3590 (3000K 90 CRI) will be enough for the space and a Mean Well Driver HLG-240H-C2100B. I have this heatsink too: Size: 11.8"(L) x 5.51"(W) x 0.79"(H) / 300 mm (L) x 140 mm (W) x 20 mm (H).

So I think I can build a great light right? What do you think? Maybe some advice to build something better? I only have 130-140$ for it. How many watts will run this DIY?

I´ll buy the components at RapidLed.com

This will beat the Mars Hydro 300w right?

 

[Airwalker16]

That's a bit much of a driver for a 4X4 but dimmed down should be fine. Definitely throw some PC fans that are always on when the lights are to actively cool those heatsinks.

 

[TomBombadil420]

That's a bit much of a driver for a 4X4 but dimmed down should be fine. Definitely throw some PC fans that are always on when the lights are to actively cool those heatsinks.

Thanks! Yes I have fans for it. I really don´t know anything about DIY but I´ll learn to make it easy, do you said that´s too much for my tent? How I can dimm that?

 

[DesertPlants]

Hello my friends, I want to let it go the Mars Hydro 300W and I have read that it can be upgraded with 2 Cree CXB3950 but I do not trust in the driver and I prefer to build something myself.

My tent is small 24x24x48" I think you told 2x2 right? So I i´m reading a lot and see that 2 CREE CXB3590 (3000K 90 CRI) will be enough for the space and a Mean Well Driver HLG-240H-C2100B. I have this heatsink too: Size: 11.8"(L) x 5.51"(W) x 0.79"(H) / 300 mm (L) x 140 mm (W) x 20 mm (H).

So I think I can build a great light right? What do you think? Maybe some advice to build something better? I only have 130-140$ for it. How many watts will run this DIY?

I´ll buy the components at RapidLed.com

This will beat the Mars Hydro 300w right?

I am assuming you are talking about the 36 volt version. That will well outdo the Mars light. You will be pushing out 149.1 watts total at 37.275 watts per square foot. The Mars Hydro 300W pulls 135 watts and puts out 4400 lumens (on the high side), so that's about 32.59 lumens per watt. The Cree COBs will be pushing about 19,250 lumens or 130.46 lumens per watt. That should do nicly for you.

 

[DesertPlants]

I am assuming you are talking about the 36 volt version. That will well outdo the Mars light. You will be pushing out 149.1 watts total at 37.275 watts per square foot. The Mars Hydro 300W pulls 135 watts and puts out 4400 lumens (on the high side), so that's about 32.59 lumens per watt. The Cree COBs will be pushing about 22,000 lumens or 147.55 lumens per watt. That should do nicly for you.

To be honest, with such a short working height, you might want to consider running them at 1750 mA (122.2 watts).

 

[TomBombadil420]

I am assuming you are talking about the 36 volt version. That will well outdo the Mars light. You will be pushing out 149.1 watts total at 37.275 watts per square foot. The Mars Hydro 300W pulls 135 watts and puts out 4400 lumens (on the high side), so that's about 32.59 lumens per watt. The Cree COBs will be pushing about 22,000 lumens or 147.55 lumens per watt. That should do nicly for you.

This is so nice to read yes, the cree are 36V. Thanks for the input!

 

[TomBombadil420]

To be honest, with such a short working height, you might want to consider running them at 1750 mA (122.2 watts).

And how I can run with that specs? Sorry for too many questions...

 

[DesertPlants]

This is so nice to read yes, the cree are 36V. Thanks for the input!

I had a slight calculation flub. I corrected it, but the reccomendation still stands.

 

[DesertPlants]

And how I can run with that specs? Sorry for too many questions...

Well, that's actually a problem. None of the major HLG CC drivers works with only two COBs at 1750mA. You would need to use an HLG-150H-36A/B. That would come out to 122.2 watts, but make sure you wire them in paralell instead of in series.

 

[TomBombadil420]

Well, that's actually a problem. None of the major HLG CC drivers works with only two COBs at 1750mA. You would need to use an HLG-150H-36A/B. That would come out to 122.2 watts, but make sure you wire them in paralell instead of in series.

And this: https://www.rapidled.com/mean-well-hlg-185h-c1050b/ will work?

 

[DesertPlants]

And this: https://www.rapidled.com/mean-well-hlg-185h-c1050b/ will work?

No, that's a constant current driver running at 1.05 A. For two CXB3590 36V COBs, you need a constant voltage driver if you want to be as efficient as possible. Arrow is out of HLG-150H-36A drivers, but mouser has them in stock for $45.70. $7.99 shipping, $53.69 total.

 

[Airwalker16]

Or he could use the 72v CXB cob chips.

 

[TomBombadil420]

Thanks to everyone for the answers but like I said I´m so noob about diy. If I decide use the previous driver HLG-240H-C2100B what I need to do? I dont understand how calculate anything and for that reason I asked a lot

 

[Airwalker16]

You've already purchased the cobs?

 

[TomBombadil420]

You've already purchased the cobs?

No, anything yet.

 

[Airwalker16]

No, anything yet.

Oh well in that case man, just buy 4 citizen clu048-1212's and an hlg-185h-c1400b and run them in series that way.

 

[Airwalker16]

https://cobkits.com/product/citizen-clu048-1212-80cri-gen6

 

[Airwalker16]

Or 4 of these on an HLG-185H-C1050B

https://cobkits.com/product/luminus-cxm22-gen3-3000k-90-cri/

 

[TomBombadil420]

Oh well in that case man, just buy 4 citizen clu048-1212's and an hlg-185h-c1400b and run them in series that way.

And that will be better Option? How May watts from the wall will be? I want to save in the bill too.

And the heatsink i have will be good for 4 cobs?

 

[Airwalker16]

And that will be better Option? How May watts from the wall will be? I want to save in the bill too.

And the heatsink i have will be good for 4 cobs?

Show us a picture of the heatsink. And as long as you strap on a fan or two to the back it should be fine.