I have just recently upgraded my under cabinet lighting. For each cabinet, I used a little PIC controller, with a 433Mhz receiver. I used 12V supply for both the LED lights and with a 5v regulator for the digital parts. I have tested quite a bit of supplies, both from Ebay and Amazon. I mostly just buy the 12V power bricks and just remove the cover and use the bare parts. I also bought, on Ebay the power brick parts, with the plastic cover. Most of the problem I had was that they could not supply the claimed current. I bought all 5A, 12V. A couple of them can only supply about 2.5A. One, had a bad filter cap that I had to replace. Aside from that, they all seems to be OK. None of them broke. I'm now running these 24/4 for about two weeks. I'll have to see how long they'll last.