Lighting Heat Sink for Citizen 1212

[supersi]

Hi Guys,

Love the site and have used it over the last few weeks to gather a few bits.

I’m currently building a 5 cob light running citizen 1212’s but am struggling to find suitable passive heat sinks.

https://www.mouser.co.uk/Search/ProductDetail.aspx?qs=0JU57JYmZjv5jihiTPLW0Q==

Would this one be ok? I’ll be using some arctic silver to stick the led chip to it.

Or better of with?

https://led.cdiweb.com/ProductDetail/MODULEDXTRA9980B-MechaTronix/574061/

I’ll be running them on a Mean Well HLG 320H C1400B.

Cheers

 

[MedGrower]

Hi Guys,

Love the site and have used it over the last few weeks to gather a few bits.

I’m currently building a 5 cob light running citizen 1212’s but am struggling to find suitable passive heat sinks.

https://www.mouser.co.uk/Search/ProductDetail.aspx?qs=0JU57JYmZjv5jihiTPLW0Q==

Would this one be ok? I’ll be using some arctic silver to stick the led chip to it.

Or better of with?

https://led.cdiweb.com/ProductDetail/MODULEDXTRA9980B-MechaTronix/574061/

I’ll be running them on a Mean Well HLG 320H C1400B.

Cheers

Hello! I'd recommend Moduled Mega 13450-HBG. That is rated for 57w so it will do for 1212 chip nicely. https://led.cdiweb.com/ProductDetail/MODULEDMEGA13450BHBG-MechaTronix/574066/

 

[wwwillie]

Hello! I'd recommend Moduled Mega 13450-HBG. That is rated for 57w so it will do for 1212 chip nicely. https://led.cdiweb.com/ProductDetail/MODULEDMEGA13450BHBG-MechaTronix/574066/

I like that one a lot. Does a nice job on mine.

 

[orrganic]

I like that one a lot. Does a nice job on mine.

How much does one of these cost?

 

[orrganic]

http://www.cutter.com.au/proddetail.php?prod=cut3020http://
I run 1212s at 50w on these and its amazing.

 

[KonopCh]

Go with active - you'll have more photons in your tent if your COBs are cooler.
Little 2-3W fan on bar heatsink is only drop in the sea.

 

[orrganic]

Go with active - you'll have more photons in your tent if your COBs are cooler.
Little 2-3W fan on bar heatsink is only drop in the sea.

@supersi Keep in mind active are smaller size overall limiting future upscaling, the drop in the sea of 2-3 watts means your running 47w per cob, which is 450 lumens per cob less multiply that by how many cobs you run and eg 4 and you've lost 1800 lumens over one quarter the output of an entire chip running 50w... The active I have in front of me right now give off 25db x4 that's an extra 100db in your setup. Not to mention they need to be cleaned thoroughly eventually.

 

[BigSm0]

Cost of fans, drivers. Noise, wiring, the savings on efficiency is definitely lost in the extra wattage. 2-3 watts plus drivers draw. If gaining efficiency is that important I’d upgrade the cobs. Version 6’s are out, 1812’s,1818’s. This is my opinion

 

[orrganic]

Cost of fans, drivers. Noise, wiring, the savings on efficiency is definitely lost in the extra wattage. 2-3 watts plus drivers draw. If gaining efficiency is that important I’d upgrade the cobs. Version 6’s are out, 1812’s,1818’s. This is my opinion

How much do 18s retail for?

 

[KonopCh]

@supersi Keep in mind active are smaller size overall limiting future upscaling, the drop in the sea of 2-3 watts means your running 47w per cob, which is 450 lumens per cob less multiply that by how many cobs you run and eg 4 and you've lost 1800 lumens over one quarter the output of an entire chip running 50w... The active I have in front of me right now give off 25db x4 that's an extra 100db in your setup. Not to mention they need to be cleaned thoroughly eventually.

You run same wattage per COB. And you get more photons because COB is more cooled.
I have Arctic alpine fans, which has 0.3 sone. This is 20 dB. I have 5 of them and you cannot hear them in front of tent. Actually my computer is louder.
MW drivers are 92-95% efficient, so you don't waste too much wattage.

But yea, agree with BigSm0... if you have money, go passive and get latest and the most efficient chip (Citizen 1825 gen 6, Vero 29 gen 7, CXM32). Get more of them and drive them at lower current. That means also more heatsinks and other stuff.