CobKits
Well-Known Member
same tech in all 3 you listed - similar efficacy per $/wattseems like the whole COB crowd is behind on lighting technology. a large number of small LEDs would give much more uniform coverage and the new 561 strip lights can produce 165LPW and operate without heat sinks at 700ma. all they need is a simple wood frame to hold them and a little soldering to connect them.https://www.digikey.com/products/en?s=55345&v=976 these would work as well as quantum boards at a much lower cost and without heavy heat sinks and frames to hold them they would be a lot lighter
obviously the more legwork you put into a DIY the lower the cost will be.