Diy cob led grow light

S

stonedmonkey93

Member
Hey guys,

I've been doing my research on DIY COB and I am aiming for 310W. The pros here please hear out my spec and help me.

I'm going with 4 vero 29 D73SE COBS, CREE are out of my budget. 3500K 80CRI , with maximum current of 4.2A.

BXRC-35E10K0-D-73-SE Bridgelux | Optoelectronics | DigiKey

Order today, ships today. BXRC-35E10K0-D-73-SE – LED Lighting COBs Engines Modules Chip On Board (COB) series White, Warm Round from Bridgelux. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
www.digikey.in www.digikey.in

The driver I'm going with is 2.1A mean well, as I've read that vero se performs at max efficiency on a higher current unlike cree. This produce 178lumens/watt as per the data sheet provided.

HLG-320H-C2100B MEAN WELL USA Inc. | Power Supplies - External/Internal (Off-Board) | DigiKey

Order today, ships today. HLG-320H-C2100B – 2.1A 76 ~ 152V Constant Current LED Driver AC DC Converter Topology 1 Output from MEAN WELL USA Inc.. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
www.digikey.in www.digikey.in

Finding the heat sink was the most difficult of all, and using the ledgardener.com I calculated my thermal resistance of the cobs to be 0.7 degree celcius per watt.


This heat sink have a dia of 58(mm) cob dia(around 45) and can dissipate 0.78c/w.

What are your thoughts guys. I want to stick to one driver as well. As I'm from india and the cost of these imported equipments are very expensive than the actual price.

Thanks in advance guys.
 
Boatguy

Boatguy

Well-Known Member
stonedmonkey93 said:
Finding the heat sink was the most difficult of all, and using the ledgardener.com I calculated my thermal resistance of the cobs to be 0.7 degree celcius per watt.

https://www.mouser.in/ProductDetail/Wakefield-Vette/DUALLED-5850?qs=sGAEpiMZZMuIeULrOsCjA1mOehAAoQhpAu7JD7c96VCTy6gTBuoVNw==
Click to expand...
That rating is only if you actively cool it with a fan. To passively cool you would need a much bigger heatsink. If you look at the datasheet it explains things better than the mouser description.
Not that there is anything wrong with active cooling, but you would need another driver to power them.
 
S

stonedmonkey93

Member
Boatguy said:
That rating is only if you actively cool it with a fan. To passively cool you would need a much bigger heatsink. If you look at the datasheet it explains things better than the mouser description.
Not that there is anything wrong with active cooling, but you would need another driver to power them.
Click to expand...
Thanks for that. Rest everything looks fine. I'm not looking for fans as more drivers and more expenses. Can u suggest me an optimal heat sink.
 
S

stonedmonkey93

Member
stonedmonkey93 said:
Hey guys,

I've been doing my research on DIY COB and I am aiming for 310W. The pros here please hear out my spec and help me.

I'm going with 4 vero 29 D73SE COBS, CREE are out of my budget. 3500K 80CRI , with maximum current of 4.2A.

BXRC-35E10K0-D-73-SE Bridgelux | Optoelectronics | DigiKey

Order today, ships today. BXRC-35E10K0-D-73-SE – LED Lighting COBs Engines Modules Chip On Board (COB) series White, Warm Round from Bridgelux. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
www.digikey.in www.digikey.in

The driver I'm going with is 2.1A mean well, as I've read that vero se performs at max efficiency on a higher current unlike cree. This produce 178lumens/watt as per the data sheet provided.

HLG-320H-C2100B MEAN WELL USA Inc. | Power Supplies - External/Internal (Off-Board) | DigiKey

Order today, ships today. HLG-320H-C2100B – 2.1A 76 ~ 152V Constant Current LED Driver AC DC Converter Topology 1 Output from MEAN WELL USA Inc.. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
www.digikey.in www.digikey.in

Finding the heat sink was the most difficult of all, and using the ledgardener.com I calculated my thermal resistance of the cobs to be 0.7 degree celcius per watt.


This heat sink have a dia of 58(mm) cob dia(around 45) and can dissipate 0.78c/w.

What are your thoughts guys. I want to stick to one driver as well. As I'm from india and the cost of these imported equipments are very expensive than the actual price.

Thanks in advance guys.
Click to expand...
The heat sink I mentioned seems to be wrong, this seems to be more appropriate.

 
M

maddmango

Well-Known Member
stonedmonkey93 said:
The heat sink I mentioned seems to be wrong, this seems to be more appropriate.

Click to expand...
Off-topic but I was able to get a quote for the BXEB Gen 3 4 foot strips at $9.5 with a minimum of 30 ordered. No need for heatsinks if you run the at spec. I know that it would cost you more but then again you could build more lights as well and no need to pay for the heatsinks or shipping. Source the drivers from Digikey along with the LED's and save on shipping.
 
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