DIY Passive cooling with PIN Heatsinks SST120 and SST140

Stephenj37826

Stephenj37826

Well-Known Member
robincnn said:
For all those hardcore DIY'ers who are:
1) Not afraid to drill and tap baking sheets or Heatsink USA
2) and willing to spend $75 + Shipping on something new and efficient
3) not afraid to venture into the bright unknown

*Credits to @Stephenj37826 from these boards
38*8=304 LED Samsung 561C Top Bin diodes on a 11.25x7 inch board
http://www.samsung.com/global/business/led/support/tools/calculator-pkg

38 diodes per string and 8 strings.
0.065ma per string
0.065*8= 520ma
6.8W*8=54.4 Watts per board is 187.4 lumen per watt.

You will need to run 1825 at 17 watts to for similar efficiency.
View attachment 3821377

These boards can be run at upto 150 watts
View attachment 3821374

Not available online. contact through website to orders. Got only 40pcs stock for now. $75 each and i don't set the price.
https://northerngrowlights.com/community/contact


View attachment 3821372

View attachment 3821373


at 150 watts
169ma per string
8 strings
=1352ma total

18.6W per string.
8 strings
=148.8Watts
159Lm/w

View attachment 3821380
1825 at 150 watts
View attachment 3821382
Can anyone check my math here ? @Stephenj37826

These boards are a little easier to cool as the heat is spread across a large area. With COB the heat is concentrated.
Click to expand...

The math looks good. Pretty much you'll need 2 1825 citizen to match one of these boards at any given current. Thermal management is much easier. Where these will really shine is in an actively cooled setup. Tj levels that are not achievable with cobs that can be had here.
 
Stephenj37826

Stephenj37826

Well-Known Member
robincnn said:
For all those hardcore DIY'ers who are:
1) Not afraid to drill and tap baking sheets or Heatsink USA
2) and willing to spend $75 + Shipping on something new and efficient
3) not afraid to venture into the bright unknown

*Credits to @Stephenj37826 from these boards
38*8=304 LED Samsung 561C Top Bin diodes on a 11.25x7 inch board
http://www.samsung.com/global/business/led/support/tools/calculator-pkg

38 diodes per string and 8 strings.
0.065ma per string
0.065*8= 520ma
6.8W*8=54.4 Watts per board is 187.4 lumen per watt.

You will need to run 1825 at 17 watts to for similar efficiency.
View attachment 3821377

These boards can be run at upto 150 watts
View attachment 3821374

Not available online. contact through website to orders. Got only 40pcs stock for now. $75 each and i don't set the price.
https://northerngrowlights.com/community/contact


View attachment 3821372

View attachment 3821373


at 150 watts
169ma per string
8 strings
=1352ma total

18.6W per string.
8 strings
=148.8Watts
159Lm/w

View attachment 3821380
1825 at 150 watts
View attachment 3821382
Can anyone check my math here ? @Stephenj37826

These boards are a little easier to cool as the heat is spread across a large area. With COB the heat is concentrated.
Click to expand...

The math looks good. Pretty much you'll need 2 1825 citizen to match one of these boards at any given current. Thermal management is much easier. Where these will really shine is in an actively cooled setup. Tj levels that are not achievable with cobs that can be had here.
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Stephenj37826 said:
I have tested 2 of these boards at 75 watts each on a plain 18x24 .125 inch aluminum plate with a fan blowing across the back and it stayed cool to the touch. Like maybe 5° warmer than ambient. I will test again. I would've used thermal camera but it was bare aluminum.

These are designed to be ran in parallel.

So they fit

HLG 150H C1400 2-4 boards works well

HLG 240H C2100 . 3-5 boards works well

HLG 320H C 2800. 4-6 boards works well.

More or less can be added to any of these combos.

I'll check at the Home Depot for stock size aluminum plate the works right off the shelf and do a quick throw together in a couple days and show how easy these are to build with/cool.

So in general the cost of these boards for the efficiency is right in line with the best cobs just different form factor.

A very low profile design can be had here as well as even coverage for tents. If one is Iooking for ultimate efficiency these are the ticket. I've got a a production prototype built that pulls 165 watts at the wall that is amazingly bright for such low wattage. 2 of these in a 4x4 would be very good.

6 boards in a 4x4 with 2 240 drivers would be an amazingly good amount of light. I'm not sure I'd want more than this. I've tried higher light levels and saw no real gain.

These 561c top bin are 20-25% higher efficacy than 561b.........
Click to expand...
Are you recommending these for all stages of growth or just for veg?

How did these boards compare to the COB's, kinds looks like a naked Nexlight veg light lol..........
 
sixstring2112

sixstring2112

Well-Known Member
Stephenj37826 said:
I have tested 2 of these boards at 75 watts each on a plain 18x24 .125 inch aluminum plate with a fan blowing across the back and it stayed cool to the touch. Like maybe 5° warmer than ambient. I will test again. I would've used thermal camera but it was bare aluminum.

These are designed to be ran in parallel.

So they fit

HLG 150H C1400 2-4 boards works well

HLG 240H C2100 . 3-5 boards works well

HLG 320H C 2800. 4-6 boards works well.

More or less can be added to any of these combos.

I'll check at the Home Depot for stock size aluminum plate the works right off the shelf and do a quick throw together in a couple days and show how easy these are to build with/cool.

So in general the cost of these boards for the efficiency is right in line with the best cobs just different form factor.

A very low profile design can be had here as well as even coverage for tents. If one is Iooking for ultimate efficiency these are the ticket. I've got a a production prototype built that pulls 165 watts at the wall that is amazingly bright for such low wattage. 2 of these in a 4x4 would be very good.

6 boards in a 4x4 with 2 240 drivers would be an amazingly good amount of light. I'm not sure I'd want more than this. I've tried higher light levels and saw no real gain.

These 561c top bin are 20-25% higher efficacy than 561b.........
Click to expand...
i have plenty of 7 in wide aluminum bar stock that is 1/4inch thick,do you think this alone will handle cooling if i were to leave about 6 inches space between boards on like 5 foot long bar? of course i have plenty of air movement
 
Stephenj37826

Stephenj37826

Well-Known Member
Evil-Mobo said:
Are you recommending these for all stages of growth or just for veg?

How did these boards compare to the COB's, kinds looks like a naked Nexlight veg light lol..........
Click to expand...
sixstring2112 said:
i have plenty of 7 in wide aluminum bar stock that is 1/4inch thick,do you think this alone will handle cooling if i were to leave about 6 inches space between boards on like 5 foot long bar? of course i have plenty of air movement
Click to expand...
If you have plenty of air movement should work well. What wattage would you run on each bar?
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Stephenj37826 said:
If you have plenty of air movement should work well. What wattage would you run on each bar?
Click to expand...
I have no clue lol. Just looking into it .

My current DIY lights one is a 275w 5K 4 COB build in the veg tent and the other is a 600w+ 3K 8 COB build for half the flower tent. I am still needing to light up the other half of the flower area preferable not with the hot HID.........the 600W light is 2 (4) COB bars but they make up one light, I built it that way so I could have more adjust ability over the grow area.

IMG_20161031_191038.jpg


IMG_20161103_145532.jpg
 
Stephenj37826

Stephenj37826

Well-Known Member
Evil-Mobo said:
Are you recommending these for all stages of growth or just for veg?

How did these boards compare to the COB's, kinds looks like a naked Nexlight veg light lol..........
Click to expand...
These work very well compared to cobs fit both veg and flower. For flower we recommend a reflective area .
Evil-Mobo said:
I have no clue lol. Just looking into it .

My current DIY lights one is a 275w 5K 4 COB build in the veg tent and the other is a 600w+ 3K 8 COB build for half the flower tent. I am still needing to light up the other half of the flower area preferable not with the hot HID.........the 600W light is 2 (4) COB bars but they make up one light, I built it that way so I could have more adjust ability over the grow area.

View attachment 3821859


View attachment 3821862
Click to expand...
These at 80 watts each is the sweet spot.

2X 3 board bars on HLG 240H C 2100 will surprise you. If you want similar wattage 4 boards per bar in HLG 320H C 2800 would give you more light than your current cob setup with the same wattage.
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Stephenj37826 said:
These work very well compared to cobs fit both veg and flower. For flower we recommend a reflective area .


These at 80 watts each is the sweet spot.

2X 3 board bars on HLG 240H C 2100 will surprise you. If you want similar wattage 4 boards per bar in HLG 320H C 2800 would give you more light than your current cob setup with the same wattage.
Click to expand...
I left that part out my bad the veg light is running a mean well 240-C1750B with a dimmer, and the flower light setup is running a mean well 320-C2100B I am a fan of dimmers on these COB lights.

Can the boards be dimmed too with a pot or would you need an electronic raspberry pi type of deal for that??
 
S

Shugglet

Well-Known Member
dabby duck said:
@robincnn

Would it be possible to run a Version 7 Vero 29 @ around 150 watts each?

4x in a 4x4' tent?

Do you happen to have a graph displaying the output efficiency at that wattage or have a link? I can't seem to find any info on the V7 chips, so many good graphs round here...!
Click to expand...
Its possible, but is it practical to run 150w and try to passively cool it? Sounds like some sort of active cooling would be necessary at those currents. Bridgelux website has all the data sheets for the Vero 29s. But there are also 3 different versions of the gen 7 Vero remember.
 
T

ThaiBaby1

Well-Known Member
Stephenj37826 said:
These work very well compared to cobs fit both veg and flower. For flower we recommend a reflective area .


These at 80 watts each is the sweet spot.

2X 3 board bars on HLG 240H C 2100 will surprise you. If you want similar wattage 4 boards per bar in HLG 320H C 2800 would give you more light than your current cob setup with the same wattage.
Click to expand...
Idea,
for a cheap passive heatsink, use an aluminum baking pan and put bags of water or gel into it.
 
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