Han wrote:

I'm looking for LED undercabinet lights as well. What was it you
found? More info may help with your question, too!

Consider a few free HF flashlights. Hacksaw off the heads glue the heads
into a 1x2 having suitable sized holes.

Solder the lights to the leads of a 4.5vdc wall-wart. Mount the whole
shebang under the cabinets.

The trick is to getting them to turn off and on. I didn't have a clapper, so
I climbed into the attic and tapped into the overhead lighting with wires
leading to an outlet mounted high on the wall under the cabinets. I then
used my imprinting device to concoct a "SWITCHED" sign to put on the outlet.