In my area the undercabinet lights are usually fluorescent to meet the energy code but I frequently puck lights in upper cabinets. I use
Hera Lightings premium line and have never had a call back. They are made in Germany instead of China where most of the pucks are made but they are not cheap either. You can buy them in sets including the transformer or individually. As I remember they are about $25-$35 each.
Please don’t use the 120 volt pucks that one retailer now sells. They are not listed for recessed mounting or hard wiring. I have seen many failures of the same brands low voltage version of pucks.
Curt
