SupraSPL
Well-Known Member
Finally got around to organizing this and I figured it might come in handy for those who are designing DIY lamps. These charts show the surface area and surface area/cost for each of the Heatsink USA profiles.
![HeatsinkUSA.png](/data/attachments/2399/2399264-5e9e97414b2fd5d53a91cfc51b17fd78.jpg)
So in summary, the cheapest surface area is the 2.08" profile. It gives a lot of spread, maybe too much spread for our purposes. The 4.85" is also cheap and might be good for a vegging heatsink. Thin base plate though, not ideal for COBs.
The 4.6" serrated is a good value and it has a .23" baseplate thickness/riser height so it might be good for COB and gives a good spread between COBs. It has decent height to the fins, so uses active cooling efficiently (120mm fan should cover all fins). The 4.9" has a thick.3" base plate and still gives a good spread, should be very good for high powered COBs. Same with the 5.88" and it fits 140mm fans.
![HeatsinkUSA.png](/data/attachments/2399/2399264-5e9e97414b2fd5d53a91cfc51b17fd78.jpg)
So in summary, the cheapest surface area is the 2.08" profile. It gives a lot of spread, maybe too much spread for our purposes. The 4.85" is also cheap and might be good for a vegging heatsink. Thin base plate though, not ideal for COBs.
The 4.6" serrated is a good value and it has a .23" baseplate thickness/riser height so it might be good for COB and gives a good spread between COBs. It has decent height to the fins, so uses active cooling efficiently (120mm fan should cover all fins). The 4.9" has a thick.3" base plate and still gives a good spread, should be very good for high powered COBs. Same with the 5.88" and it fits 140mm fans.
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