thanks for the "heads up"
I think you nailed it with inferior fans. Each heatsink should have it's own fan and looking at the relationship of the fans to the heatsinks I can see several hotspots.
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Most of these type units just used the heatsinks taken from the older PC innovations. I have noticed that lack of central core which could be just cost savings as they were often copper or it is due to drawing the heat away from the center of the cob. Either way the heatsinks are cheap (no heatpipe) and not designed to be run without a fan directly over them.
From looking at your pics its pretty clear that the builders could not fit all the drivers in the box so they cut out the fans.
I dont know if you can wire new fans in that unit but a high end delta 120mm fan can move 240cfm, takes 3.2A and sounds like an airport.
Second thought. You flip the lid so that all the drivers and fans are on the outside. Then flip the fans so they blow in. Get 16 120mm fans, (that looks like a 120mm heatsink?) Check out Cooler Master 4 pack for 12 bucks - $48 for 16 at newegg. .16 amps each @12v so get a AC/DC brick that can do 3A or 4A@12v for under $20 at the same place. Screw the fan to the heatsink somehow. It looks the the brackes they used covered the screw hole on the heatsink. Problem solved?
Remember to use good thermal paste on the back of the COB and real thin too.
Ya make sure you use like artic silver thermal past. Make sure to buy the silver kind though don't buy the cheap white stuff. That's some of the best thermal paste out and you can get a tube from radio shack for like 10 bucks.
So, I have finally given up on endless attempts to contact this damn company I bought this COB light plant from. I have wanted to attempt to repair this unit for some time now and have honestly been fairly intimidated, but with $1200 invested, I have little choice other than to DIVE IN
Therefore, since I have learned a little bit more about the inner workings of these LED COB's as of late, I am now going to try to fix it
Here are a few shots of the unit to give some perspective:
[URL=https://www.icmag.com/ic/picture.php?albumid=10746&pictureid=1226851&thumb=1]View Image[/url] [URL=https://www.icmag.com/ic/picture.php?albumid=10746&pictureid=1226852&thumb=1]View Image[/url]
Did you use your credit card to purchase this? If so, dispute the charge ... you'll get your money back, likely all of it.