Its a lot cheaper than Sinkpads @$6.70 for 10, but appears to have the unwanted dielectric layer. Does anyone know how much heat transfer resistance the dielectric layer has, or if you could solve the problem by scraping it off with an X-acto?
Someone posted that they don’t do a very good job at conducting heat to the perimeter of the pad because they are far to thin (as are all known copper chinese sink pads at this time). 2mm is said to be optimal thickness for copper pads.
I've used them extensively since I changed a T6 1A on alu pcb to a T6 1A on this pcb and got more than +25% lux. (Am a throw guy, lumens do not wow me)
And they were available a year + ago, in great quantity at reasonable prices compared to SinkPad and the copper pcb's in either Int. Outdoors or Led Tech.de that I were aware existed.