GT,
I do love your idea. I believe, COB tech is the future. DIY COB tech especially. Rock on Bruddah.
I've been very interested in just such a project.
If you decide to do it, I'm all over it.
And for those readers we never see,
this design with the solid heatsinks and the Veros is super easy to assemble.
The Vero line has a plug-in connector so you don't have to solder a thing! And ... since they're so low-power and cheap, you can just glue 'em on with thermal grease/paste.
You don't have to be so careful to get excellent contact with the heatsink by torquing 'em down really tight. You just paste them on and apply pressure with a stack of books or something. No having to tap screw holes in the heatsink - if it fails or you want to replace it, you just scrape the old one off, re-prep the area and paste a new one down.
The solid heatsinks function as a panel - the whole thing hangs from the ceiling with no case or brackets, etc. I've seen other designs that use aluminum L-bar to attach things together. Actually, I saw a good idea that used a large T-bar to hold a row of COBs attached to the bar itself - nice and simple, but you still have to connect all them together, too, or individually hang them - lots of drilling and bolting.
And since they cover the entire area, these large sinks are bigger than needed and can cool at least 50% more power. Fans are barely necessary. You can get 12v computer case fans for under $5 and drive them with a cheapo 12v wall-plug thingy like we already have all over the house.
The Chinese make 'em cheap!
Connecting to the drivers is simple - wire the leads from all the COBs together in series and hook 'em to the driver output. Easy peasy. The Mean Well line is top-notch reliable, and this design leaves them enough headroom so they won't be driven at max.
Ya paste the COBs down, wire 'em up, connect to the Mean Well, attach the fans and wire them to the 12v transformer, hang it up, plug it in, and Bobs yer uncle! No soldering, no screw hole tapping, only some drilled holes for mounting the driver and fans and hanging the sink - it's aluminum - soft - simple.
[Edit] And! ... the drivers and heatsinks are basic foundational stuff. I could mount anything to the sinks in the future, and the drivers will drive any other COB or LED design. It's not really a wasted, faddish investment.